(((Subscript[PR, w])(C)=(1-d)+d((w(A)(((Subscript[PR, w])(A))/(C(A)))+w(B)(((Subscript[PR, w])(B))/(C(B)))+w(D)(((Subscript[PR, w])(D))/(C(D)))+w(E)(((Subscript[PR, w])(E))/(C(E)))))=(1-0.8)+0.8(0.5(0.09/3)+1(0.12/4)+1.9(0.15/3)+2(0.2/4))=0.4.)\[Placeholder](4))