Answer Happy

Having some trouble with this. My answers to B) are incorrect,which leads me to think my first answer is incorrect. Could someoneplease help me? Thanks!
(a) Calculate the height (in m) of a cliff if it takes 2.28 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.08 m/s. (Enter a number.) 7.07 m (b) How long (in s) would it take to reach the ground if it is thrown straight down with the same speed? (Enter a number.) S