A beam ABCDE, with support B $2$ m from the left end and support $E$ at the right end, is $11$ m long. C is $4m$ from the left end and $D3m$ from the right end. A concentrated load of $3$ kN acts at $A.$ Concentrated loads of $3$ kN and $4$ kN act at C and D respectively. There is a uniformly distributed load of $5k\frac{N}{m}$ between $C$ and D $.$

a$.$ Draw the beam and calculate the reactions of the supports.

$(4)$

b$.$ Draw the SF and BM diagrams and show the principal or main values on the diagrams.

$(6)$