A fixed-end beam of length L is loaded by a bdistributed load in the form of a

Question:

A fixed-end beam of length L is loaded by a bdistributed load in the form of a cosine curve with maximum intensity q0 at A.
(a) Use the fourth-order differential equation of the deflection curve to solve for reactions at A and B and also the equation of the deflection curve.
(b) Repeat (a) if the distributed load is now q0 (1 - x2 / L2).