Please show all your work to help me better understand. Please only use calculas 1 formulas and equations. Thank You!!

4. A snowball is left in Shel Silverstein's bed overnight. The graph at left shows the snowball's radius as a function of time. Recall that the volume of a sphere is given by the equation: 4 radius (mm) time (minutes) a. Based on the graph, sketch a graph of - as a function of time (t) b. Using your answer to part (a) and what you know of related rates, sketch a graph of - as a dt dr function of the radius (r). Be as precise as possible in your sketch. It may help to consider dt relates to r. c. Explain how you created your graph in part (b)