Q$2.$ The $50-kg$ flowerpot is suspended from wires AB and BC which have diameters of $1\mathrm{.}5$ mm and $2$ mm $,$ respectively. If the wires have a normal failure stress of ${}_{\text{b}\text{i}\text{t}\text{i}}=350$MPa, determine the factor of safety of each wire.

$(22$ points$)$