The position along the axis of an object is given as a

Question

Solve the all parts of given question:

Question: The position along the axis of an object is given as a function of time by the equation x= 7+15t²+5t³ where x is in meters and t is in seconds.

Part A: What is the position at t=3 s?

Part B: What is the velocity at t=3 s?

Part C: what is the acceleration at t=3 s?

Part D: What is the acceleration constant?

Part E: What is the average acceleration for the interval t=0-3 s?

Show how you get the answer, so that I can better understand how to do it.