The volume of a cantaloupe is approximated by. The radius is growing at the rate of 0.7 cm/week, at a time when the radius is 6.2 cm. How fast is the volume changing at that moment?
a) 107.47 cm³/week
b) 96.04 cm³/week
c) 120.91 cm³/week
d) 83.54 cm³/week