not too sure how to set this one up, any help would be appreaciated, thanks!

The Happy Face Fix-It shop is having a sales promotion day. A spherical Happy Face balloon is being inflated to float above the shop. The volume, V, of a spherical balloon isV = $\displaystyle \frac{4}{3}{\pi}r^3$.Find the rate at which that volume of the balloon is increasing when the diameter is 2 m.