NEED ASAP!! At a temperature of 15˚C, a precast wall made of low-strength concrete just fits between two rigid supports.

[answerhappygod]

NEED ASAP!!
At a temperature of 15˚C, a precast wall made of low-strength
concrete just fits between two rigid supports. Its length L = 4 m,
height h = 1 m, and width w = 8 cm. The coefficient of linear
expansion is 10.8 x 10^–6/˚C and the modulus of expansion is 200
GPa.
a)Find the thermal deformation developed in this wall if the
temperature rises to 50˚C

b)Find the stress developed in this wall if the temperature rises
to 45˚C.

c) Find the axial force is developed in this wall if the
temperature rises to 45˚C.