PLEASE PLEASE HELP ME PLEASE I REALLY REALLY NEED THIS DONE ASAP Based on the graph and information given, choose the correct answer below.

a.) f’ is not defined at x = 0, x = 1 and x = 6 because at these points the graph has cusps

b.) f’ is not defined at x = -2, x = 1 and x = 4 because at these points the graph has cusps

c.) f’ is not defined at x = 0, x = 1 and x = 4 because at these points the graph has corners

d.) f’ is not defined at x = -2, x = 1 and x = 4 because at these points the graph has corners

Ahigh-altitude spherical weather balloon expands as it rises, due to the drop in atmospheric pressure. suppose that the radius r increases at the rate of 0.02 inches per second, and that r = 36 inches at time t = 0. determine the equation that models the volume v of the balloon at time t, and find the volume when t = 360 seconds. v(t) = 4π(0.02t)2; 651.44 in3 v(t) = 4π(36 + 0.02t)2; 1,694,397.14 in3 v(t) = four pi times the product of zero point zero two and t to the third power divided by three.; 4,690.37 in3 v(t) = four pi times the quantity of thirty six plus zero point zero two t to the third power divided by three.; 337,706.83 in3