How to change a formula response of Y to "Yes"?

My 1st formula is

if {FOCUS_VIEW.PT_AGREE_TO_PARTICIPATE} = 'Y' then 1

I would like it to show up in the report as Yes instead of 1

The 2nd formula is

if not isnull ({FOCUS_VIEW.CALL_1_DATE_OF_CALL}) then 1

I would like it to show up in the report as Yes instead of 1