I need help on how to solve these problems, any explanations will also help as I am using this to study for midterms, thank you!

112. Find f'(x) for f(x) = (x + 2)(2x2 - 3). Do not forget to use proper derivative notation, d/dx or d/dt, on each side of the given function. 144. A car driving along a freeway with traffic has traveled s(t) = t3 - 6t2 + 9t meters in t seconds. a. Determine the time in seconds when the velocity of the car is 0. b. Determine the acceleration of the car when the velocity is 0