E$7\mathrm{.}2.$ Problem $7\mathrm{.}3\mathrm{.}27.7\mathrm{.}3\mathrm{.}27.$ The welded tubular frame is secured to the hor$-$ izontal xy plane by a ball$-$and$-$socket support at A and re$-$ ceives support from a loose$-$fitting ring at B as shown in E$7\mathrm{.}3\mathrm{.}27.$ If the weight of the frame is negligible and it is it equilibrium, a$.$ what loads act on the frame at A $?$ b$.$ what loads act on the frame at B $?$ E$7\mathrm{.}3\mathrm{.}27$