If the zeroes of *x*^{3} + *ax*^{2} +
*bx* + *c* are *r*_{1}, *r*_{2}, and
*r*_{3}, find a cubic polynomial
*x*^{3} +
*P*(*a,b,c*)*x*^{2}
+ *Q*(*a,b,c*)*x*
+ *R*(*a,b,c*) whose zeroes are
*r*_{1}^{2},
*r*_{2}^{2},
and *r*_{3}^{2}.