=UNIQUE(FILTER(A2:A, A2:A<>""))
=COUNTIF(ARRAYFORMULA(DAYS(FILTER(C$2:C,$A$2:$A=$E2),FILTER(B$2:B,$A$2:$A=$E2))),"<=7")
=COUNTIF(ARRAYFORMULA(DAYS(FILTER(C$2:C,$A$2:$A=$E2),FILTER(B$2:B,$A$2:$A=$E2))),">7")