Determine the stiffness matrix $K$ for the frame shown below. Assume $"1"$ and $"3$

are pins. Take $E=200$GPa,$I=350{10}^{6}m{m}^4,A=15{10}^{3}m{m}^2$ for each

member.

PART B

Determine the support reactions at pins"$1"$ and $"3".$ Take $E=200$GPa,$I=350x$

${10}^{6}m{m}^4,A=15{10}^{3}m{m}^2$ for each member.