The active element of a certain laser is an ordinary glass rod 25 cm long and 1.0 cm in diameter…?

The active element of a certain laser is an ordinary glass rod 25 cm long and 1.0 cm in diameter. If the temperature of the rod increases by 73°C.
(a) Find its increase in length.

(b) Find its increase in diameter.

(c) Find its increase in volume.