A composite bar $0\mathrm{.}5$ cm thick If the bar has a yield strength of $125$ MPa, width of the bare is $8$ cm $,$then A three$-$point bend test is performed on the composite bar that is $8$ in$.$ long, and is resting on two supports $4$ in$.$ apart. the specimen deflects $0\mathrm{.}045$ in$.$ and breaks knowing the area of the bar is $400$mm$2.$ Calculate $($a$)$ the flexural strength and $($b$)$ the flexural modulus, assuming that no plastic deformation occurs.