velocity help please

A little cat, Bella, walks in a straight line, which we shall call the x axis, with the positive direction to the right. As an observant scientist, you make measurements of her motion and construct a graph of the little feline's velocity as a function of time. (See the figure .)

a) Find the x component of Bella's velocity at  t= 1.00 .
-answer should be in cm/s

b) Find the x component of Bella's velocity at t = 7.00 .
-answer should be in cm/s

c)What is the x component of her acceleration at  t= 1.00 ?
-answer should be in cm/s^2

d)What is the x component of her acceleration at  t= 6.00 ?
-answer should be in cm/s^2

e) What is the x component of her acceleration at t = 7.00 ?
-answer should be in cm/s^2