A rigid, non$-$deformable bar ABC is held by pin joint at A and connected to two deformable rods at $B$ and $C.$ All internal connections are pin joints. A $200$ kN force is applied as shown in diagram. Use the following parameters:

Cross$-$sectional area: $A_1=A_2=300m{m}^2$

Elastic modulus: $,E_1=E_2=200$GPa

Determine the following:

a$.$ whethe the assembly is ieterminafe or indeterminate $($circle one$).(5$ points$)$

b$.$ axial stress in bars $(1)$ and $(2).(20$ points$)$

c$.$ show how the elongation of the bars are related $($mark the equation$)$ and calculate the elongation of $\frac{?}{\text{b}\text{a}\text{r}}(2)(10$ points$)$