Kind look into this and solve

Show all you Problem: A particle moves according to a law of motion s(t) = 213 - 1512 + 24t, where t is measured in seconds and s(t) in feet. (a) Find the velocity at time t. (b) What is the velocity after t seconds? (c) When is the particle moving in the positive direction? (d) Find the total distance traveled during the first 6 seconds. (e) Find the acceleration at time t. (f) When is the particle speeding up? When is it slowing down