I am trying to create a trigger that will count activities (tasks) on leads.
My code is below....

When saving I am getting the following error....

Error: Compile Error: unexpected token: '}' at line 30 column 1

But if I remove the curly bracket I get a different error

Error: Compile Error: unexpected token: '<EOF>' at line 30 column 0


trigger TaskUpdateLead on Task (after delete, after insert, after undelete, after update)
{
Set<ID> LeadIds = new Set<ID>();

//We only care about tasks linked to Leads.

String leadPrefix = Lead.SObjectType.getDescribe().getKeyPrefix();

//Add any Lead ids coming from the new data

if (Trigger.new != null) {
    for (Task t : Trigger.new) {
     if (t.WhatId != null && string.valueOf(t.whatId).startsWith(leadprefix) )
         {LeadIds.add(t.whatId);
      }
   }
}
//Also add any Lead ids coming from the old data (deletes, moving an activity from one Lead to another)

if (Trigger.old != null) {
    for (Task t : Trigger.old) {
     if (t.WhatId != null && String.valueOf(t.whatId).startsWith(leadprefix) )
         { LeadIds.add(t.whatId);
      }
   }
}
if (LeadIds.size() > 0)

Lead.Activity_Count__c.updateLeadCount<LeadIds>
}


Any guidance is very much appreciated.