a$)$ Classify the truss $($simple$,$ compound, complex$)$ and analyze for

stability and determinacy.

b$)$ What is the magnitude of the horizontal deflection of joint $D$ in

$mm$ if the temperature of bar $AB$ decreased by $5$ degrees

Centigrade?

c$)$ What is the vertical deflection in $mm$ of joint $D$ if the bar BF was

fabricated too short by $0\mathrm{.}075mm?$

$E=200k\frac{N}{m}{m}^2,A=1500m{m}^2,$ Coefficient of Thermal Expansion $=12\frac{x^{-6}}{C}.$

Express your answer up to $2$ decimal places.