Could you explain please how to solve this

6. A test plane ies in a straight line with positive velocity v (r) in miles per minute at time t minutes, where v is a differentiable function of t. Selected values of 1,?(f) for o g t :2 40 are shown in the table below. {a] Use data from the table to nd an approximation for v\" [13}. Show the computations that lead to your answer. Using appropriate units, explain the meaning ofjvour answer. {b} Use data from the table to nd the average acceleration of the particle over the time interval 5 5 r 5 25 minutes. (Hint: The average acceleration is the average rate of change of the velocity] {:2} Based on the values in the table, what is the smallest number of instances at which the velocity of the plane could he 8 miles per minute on the open interval 0