Google Finance formula - YTD, 1YR, 5YR, max return

I have got the below formula for YTD:
=GOOGLEFINANCE("GOOG","price") / index(GOOGLEFINANCE("GOOG","price", date(year(today()),1,1)) , 2,2) - 1

I have got the below formula for 1 yr:
=GOOGLEFINANCE("GOOG","price") / index(GOOGLEFINANCE("GOOG","price", date(year(today())-1,month(today()),day(today()))) , 2,2) - 1

I need help with the formula for 5yr and MAX.