4. Suppose that f (t) gives the velocity of a raccoon who is wandering back and forth along a bicycle path. Consider the three expressions in f N) dt a Which expression ives the net chan e in the raccoon's position from time a to time b? g g I: t) a, [b |f(t)| a: and (b) Which expression gives the total distance the raccoon travels from time a, to time b? (c) The raccoon's average Speed between time a and time b is the total distance it traveled divided by the time elapsed. Write a mathematical expression giving the raccoon's average Speed between time a. and time b