HELP PLEASE TYSM John doesn't think before he acts, so he jumps off a 7 meter rock at a velocity of 2 meters per second into a canoe on the St. Croix River (assume the bottom of the canoe is ground, or a height of 0 meters). Answer the following (round to 3 decimal places...no units)

(a) When does John land in the canoe?

(b) John's concerned friend Sammy throws him a life jacket. Sammy's will throw the life jacket when John is 3 meters from the canoe. When does Sammy throw the life jacket?