Determine deflection at center

Problem 12-87 in Mechanics of Materials 8th edition by R.C.Hibbeler.

The W12 x 45 simply supported beam is made of A-36 Steel and is subjected to the loading shown. Determine the deflection at its center C.

There is a moment at A of (50 kip*ft). A is on a roller.
The Beam is 24 ft.