Question$-3)$ Using the construction system given below, the "Angle Method",

a$)$ Calculate the rotations $(0g,0c$ and $0p)$ of $B,C$ and $D$ nodes. $(15$ Points$)$

b$)$ Calculate the end moments occurring in the rods. $(5$ Points$)$

c$)$ Draw the moment diagram of the system. $(5$ Points$)$

$($Support C collapsed by $2cm.$ Take El$=30000kN{m}^2.)$