A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Use this if you want the answer blank if either C2 or C4 are blank:
=IF(OR(C2="",C4=""),"",IF(C2<6,IF(C4="yes","Worksheet","Form"),IF(C4="yes","Nothing","Memo")))
Use this if you want the answer blank if both C2 and C4 are blank:
=IF(AND(C2="",C4=""),"",IF(C2<6,IF(C4="yes","Worksheet","Form"),IF(C4="yes","Nothing","Memo")))
Kevin