Please solve this algebraic geometry problem. Thank you

9. Let V = V(y x2, z x3) be the twisted cubic. In the text, we showed that I(V) = (y - x2, z - x3)- a. Use the parametrization of the twisted cubic to show that y2 xz E I(V). b. Use the argument given in the text to express y2 xz as a combination of y x2 and zx3