struct shape 1 struct char usertag[5]; char desc [20]; j id; int centerx; int centery; union 1 struct 1 int height, width; J rectangle; struct f int radius; + circle; Js Each of the following statements is invalid for some reason. Provide the correct synta:x (a) s. id , desc= "circle"; (b) s.u.centerx-0; (c) s.rectangle.height-10; (d) strcpy(s.desc, "Pie chart")