An object is thrown upward at time $t=0$. After $t$ seconds, its height is $y = -4.9 t^2 + 3 t + 3.5$ meters above the ground.

(a) From what height was the object thrown? meters

(b) What is the initial velocity of the object? m/s

(c) What is the acceleration due to gravity? m/s${}^2$