To show the first day of each week, the following expression was placed in the group header:
=Format([Time_In]-Weekday([Time_In],2),"dd-mmm-yyyy")
To show the count for the campuses, I included the following expressions:
=Count(IIf([Campus]="Pecos" Or IsNull([Campus]),1,Null))
and
=Count(IIf([Campus]="Williams",1,Null))
I look for null value because the Williams campus is a recent addition and there exists records where campus is null. I could have also summed the results as with the following expression:
=Sum(IIf([Campus]="Pecos" Or IsNull([Campus]),1,0))