Pls help solve in 15min!

Velocity versus time for a really fast snail velocity (m/s) [North] O ~ time (s) a) What is the velocity at 7.0 s? Show your work. /1 b) What is the acceleration at 2.0 s? Show your work. /1 c) What is the acceleration at 5.0 s? Show your work. /1 d) Calculate the displacement from t=4.0s to 9.0s. Show your work. /2 e) Find the average velocity from t= 4.0s to t = 9.0s. Show your work. Show all your work. /2