7. Consider the following structure definitions and declarations. struct X 1 int double *bb; char *cc [30]; struct Y int double ee; struct X mm, nn; struct Y pp, qq Indicate whether each of the following statements is valid: (a) mm=pp; (b) strcpy(nn.cc, "Test"); (c) X.aa-5; (d) Y.ee-37.2; e) mm=nn