$(20$ pts$)$ According to given external moment in the middle of the beam, distributed and

single loads, please;

a$)$ find the $A_y$ reaction force, $(5$ pts$)$

b$)$ find the $M_A$ reaction moment at point $A,(5$ pts$)$

c$)$ draw shear force diagram, $(5$ pts$)$

d$)$ draw moment diagram. $(5$ pts$)$

$(M_{\text{e}\text{x}\text{t}}=CBkN.m,w=(B+1)k\frac{N}{m},F_B=(C+1)kN))$