H.W: If L1 = 10", L2 = 15", L3=36"and A1=1 in^2 , A2= 2 in^2 , A3= 2.5 in^2 and E1=20 ksi , E2 = 15 ksi, E3 = 10

ksi . A. Find Si if the wall at (1) is removed & F1 = 240 K & F2 = 30.0 K . B. Find the reactions P1 & P3 when both walls at (1) & (3) are resisting the displacement of the compounded cylinders 1,2 & 3. *