Part a$)$ For the built$-$up beam shown below, calculate the moment of inertia about the x$-$axis. $($Figure $7)$ The dimensions are d$1=5\mathrm{.}5$in$,$ d$2=13\mathrm{.}5$in$,$ d$3=7\mathrm{.}0$in$,$ and t$=0\mathrm{.}60$in$.$ Part b$)$ For the beam from Part A $($shown again here for reference$),$ calculate the moment of inertia about the y$-$axis. $($Figure $7)$ The dimensions are d$1=5\mathrm{.}5$in$,$ d$2=13\mathrm{.}5$in$,$ d$3=7\mathrm{.}0$in$,$ and t$=0\mathrm{.}60$in$.$ Express your answer to three significant figures and include the appropriate units.