Let V=Fⁿ, and let AinM_(n times n)(F). (a) Prove that (:x,Ay:)=(:A(**)x,y:) for all x,yinV. (b) Suppose that for some BinM_(n times n)(F), we have (:x,Ay:)=(:Bx,y:) for all x,yinV. Prove that