I am getting this error: "Challenge Not yet complete... here's what's wrong: 
Could not find a link post to Trailhead in your Chatter feed. Please check the requirements."

I have followed the instruction give and I am still getting this error.
 

I keep getting this error : Challenge Not yet complete... here's what's wrong:  
The Lead object does not display the formula fields correctly. Tip: check the requirements again and make sure you have the correctly forumlas and their values.

Even through Formulas validate and the functionality works as expected, anyone else ran into this?
 

Create a formula field that returns an image to indicate data quality.
Sales Managers have asked for an at-a-glance solution to see completeness on leads. Create a helper formula field that looks at 5 key fields on the Lead object and evaluates their completeness, then a second formula field that references the helper formula and returns an image.The helper formula field should be on the Lead object with a name of 'Lead Quality Helper' and a resulting API name of 'Lead_Quality_Helper__c'.
The helper formula should be of type Number.
The helper formula should evaluate the following 5 fields: Email, Phone, Company, Title, and Industry and return 0 if blank and 1 if not blank. The formula should then add all the values together to return a total value.
The image formula should be on the Lead object with a name of 'Lead Quality' and a resulting API name of 'Lead_Quality__c'.
The image formula should reference the helper formula, and return an image based on the number returned by the helper formula. The helper formula should be of type Text. Note: All of these images are already available in your Developer Edition.

1 = /img/samples/stars_100.gif with alternate text '1 star'
2 = /img/samples/stars_200.gif with alternate text '2 stars'
3 = /img/samples/stars_300.gif with alternate text '3 stars'
4 = /img/samples/stars_400.gif with alternate text '4 stars'
5 = /img/samples/stars_500.gif with alternate text '5 stars'

If none of the fields are filled out, the default should be /img/samples/stars_000.gif with alternate text '0 stars'.
The 'Lead Quality' formula must be added to the Lead Layout page layout.Check Challenge


ANS:
Lead Quality (Text) =
IF(Lead_Quality_Helper__c=1, 
IMAGE("/img/samples/stars_100.gif","1 star"), IF(Lead_Quality_Helper__c=2, IMAGE("/img/samples/stars_200.gif","2 stars"), IF(Lead_Quality_Helper__c=3, 
IMAGE("/img/samples/stars_300.gif","3 stars"), 
IF(Lead_Quality_Helper__c=4, 
IMAGE("/img/samples/stars_400.gif","4 stars"), 
IF(Lead_Quality_Helper__c=5, 
IMAGE("/img/samples/stars_500.gif","5 stars"), 
IMAGE("/img/samples/stars_000.gif","0 stars"))))))


Lead Quality Helper (Number) =
IF(ISBLANK(Email),0,1)+ 
IF(ISBLANK(Phone),0,1)+ 
IF(ISBLANK(Company),0,1)+ 
IF(ISBLANK(Title),0,1)+ 
IF(ISBLANK(TEXT(Industry)),0,1)

I can't see what I am doing wrong. Everything works just fine but I keep getting this error. 
Challenge Not yet complete... here's what's wrong: 
The Lead object does not display the formula fields correctly. Tip: check the requirements again and make sure you have the correctly forumlas and their values.


Any help will be appreciated. Thanks.

Sales Managers have asked for an at-a-glance solution to see completeness on leads. Create a helper formula field that looks at 5 key fields on the Lead object and evaluates their completeness, then a second formula field that references the helper formula and returns an image.

>The helper formula field should be on the Lead object with a name of 'Lead Quality Helper' and a resulting API name of 'Lead_Quality_Helper__c'.
>The helper formula should be of type Number.
>The helper formula should evaluate the following 5 fields: Email, Phone, Company, Title, and Industry and return 0 if blank and 1 if not blank. >The formula should then add all the values together to return a total value.
>The image formula should be on the Lead object with a name of 'Lead Quality' and a resulting API name of 'Lead_Quality__c'.
>The image formula should reference the helper formula, and return an image based on the number returned by the helper formula. The helper formula should be of type Text. Note: All of these images are already available in your Developer Edition.

1 = /img/samples/stars_100.gif with alternate text '1 star'
2 = /img/samples/stars_200.gif with alternate text '2 stars'
3 = /img/samples/stars_300.gif with alternate text '3 stars'
4 = /img/samples/stars_400.gif with alternate text '4 stars'
5 = /img/samples/stars_500.gif with alternate text '5 stars'

If none of the fields are filled out, the default should be /img/samples/stars_000.gif with alternate text '0 stars'.
The 'Lead Quality' formula must be added to the Lead Layout page layout.

ok so im having trouble on this challenege on trailhead. im confused what it means by helper formula, like how would we create a helper formular? also how would we create a image formula?

thanks if anyone answers