Hi, please help me with question 2.Please be specific in your solutionThanks a lot

and from here solve a linear system to show that F(2) = 5 9(x) + h(s) ds + F(a) - G(a) ) , and G (x) = - (9(2) - - h(s ) as - F(a ) + G (a ) ) 4. Lastly, given that u(t, x) = F(x + ct) + G(x - ct), arrive at an explicit formula for the solution to the initial value problem for (1): u(t, x) = - [g(x + ct) + g(x - ct) ] + 2c Jx-ct h ( s) ds . Question 2. Consider the function f(x, y, z) = xye ( ty +z ). Find all points (x, y, z) such that Vf(x, y, z) = (0, 0, 0)