Based on the Structural Study Vertical Cantilevers: Wind$-$Controlled Structures by Billington and Mar $(2004)$ and Garlock $(2019),$ analyze the structure subjected to uniformly distributed lateral load.

a$)$ Find the reactions $T$ and $C$ at $70ft$ above the base for each of the four columns due to the wind loads shown $(1\frac{k}{f}t).$

b$)$ Find the wind stress in each of the four columns at $70ft$ assuming a constant cross$-$sectional area as shown $(4i{n}^2$ per column$).$

c$)$ If the stresses are constant throughout the height of the column, what does this say about the form of the structure as a whole?