$1.$ A frame structure is constructed with three types of materials $($reinforced concrete$/$ steel$/$ wood$)$ shown below. Section and material properties are tabulated.

Material weight densities:

Reinforced concrete $=150$lbs$/$ft$^3$

Steel $=490$lbs$/$ft$^3$

Wood $=25$lbs$/$ft$^3$

In this problem, our focus is on determining the cumulative weight of the structure applied to the structural foundation.

a$.$ Compute the weight of two columns.

b$.$ Compute the weight of the reinforced concrete beam.

c$.$ Compute the weight of the wood beam.

d$.$Find the total weight of the structure foundation.