Problem $6$:

In the figure at right, member $(1)$ is a steel bar with a cross$-$

sectional area of $1\mathrm{.}0i{n}^2$ and a yield strength of $50$ ksi $.$

Member $(2)$ is a pair of $6061-$T$6$ aluminum bars having a

combined cross$-$sectional area of $3\mathrm{.}75i{n}^2$ and a yield strength

of $40$ ksi $.$ A factor of safety of at least $1\mathrm{.}6$ with respect to yield

is required for both members. Determine the maximum

allowable load P that may be applied to the structure. Report

the factors of safety for both members at the allowable load.