The position of a particle moving along anxaxis is given byx= 14.0t2 - 6.00t3, wherexis in meters andtis in seconds. Determine(a)the position,(b)the velocity, and(c)the acceleration of the particle att= 7.00 s.(d)What is the maximum positive coordinate reached by the particle and(e)at what time is it reached?(f)What is the maximum positive velocity reached by the particle and(g)at what time is it reached?(h)What is the acceleration of the particle at the instant the particle is not moving (other than att= 0)?(i)Determine the average velocity of the particle betweent= 0 andt= 7.00 s.

I was able to get letter a, but i am not sure what i need to do to get the rest, do i need to take the derivative or simply use regular velocity formulas? thank you