What is the cheetah's average speed for the first 3.11 s of its sprint? for the second 3.11 s of its sprint?

when you say a=4.02 i am going to acceleration in m/s^2. If the acceleration is 4.02 then you take the integral to find the speed. speed=4.02 t where t is time in seconds. [4.02 (0) + 4.02 (3.11) ]/2=6.2511 [4.02 (3.11) + 4.02 (6.22) ]/2=18.7533