Problem $3-$ Beam Deflection $(2$ Points$)$:

a$)$ Calculate the actual deflection for the beams shown, use $I=320i{n}^4,$ and $E=1\mathrm{.}3{10}^6.$ Use Table $8\mathrm{.}2.$

b$)$ If the allowable deflection is $\frac{L}{180},$ determine if the beam is adequate for deflection.