Please help

The table shows the position of a motorcyclist after accelerating from rest. t (seconds) 0 1 2 3 5 6 s (feet) 0 4.9 10.6 23.1 50.3 109.5 238.3 (a) Find the average velocity (in ft/s) for each time period. (1) [2, 4] ft/s (1i) [3, 4] ft/s (iii) [4, 5] ft/s (iv) [4, 6] ft/s (b) Plot the points in the table to create a graph of s as a function of t to estimate the instantaneous velocity (in ft/s) when t = 3. (Round your answer to one decimal place.) ft/s