a) time interval 1, zero; time interval 2, 2.02 m/s; time interval 1+2, 1.01 m/s.
b) time interval 1, zero.
a) The average velocity
To calculate the distance he walked, we first need the time in seconds.
The distance he walks in time interval 2 is
The question is not clear about the time period for which it wants the
b) His average acceleration
I hope this helps,