I need help with d & e please n thank you

A toy rocket is shot into the air. Its height, in meters, after t seconds is given by h(t) = -4.9t? + 17t + 0.8. Please use the differential rules for polynomial functions. a) Determine the height of the rocket after 2 s. (2) b) Determine the rate of change of the height of the rocket after 1 s, and 3 s. (5) c) How long does it take the rocket to hit the ground? (4) d) How fast was the rocket travelling when it hit the ground? Explain your reasoning. (2) e) Determine the equation of the tangent to the curve h(t) = -4.9t2 + 17t + 0.8 at t = 2.5 s