Strength of Materials

I need help to calculate this beam midspan defflection using moment area method.. this beam has 2 types of loads, UDL and Point load. please help me.

what is shear stress

a single-cell torque box without any bending material present in resisting a clockwise torque of 9000 in-lbs

I need assistance with below problem:

Known are: a, h, I1, I2, q. Problem find moment at C. The beams are rigidly connected at "C"!

Apparently the right solution is:

Mc=q*a^2/12 * 1 / (1+2*h*I1/a*I2), while mine solution is Mc=q*a^2/12 * 1 / (1+h*I1/a*I2).

I have used superposition method, cut the frame at "C", add moment Mc, and equating the slopes of the vertical beam CD and loaded portion of the horizontal beam AB that is CB.