$(16)4.$ Loads are applied to the bottom chord of the pin$-$jointed truss shown below. Draw

influence lines for forces in the following members and calculate and indicate the

maximum ordinate value on each influence line:

a$)U_4{U}_5$

b$)U_2{L}_3$

c$)U_1{U}_2$

d$)U_4{L}_5$