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Here's the problem that I cannot figure out how to solve:

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z = 4 - (x/2)^2 + (y/2)^2

Clear[f, x, y, z, r, t, surfaceplotter]; 

f[x_, y_] = 4 - (x/2)^2 + (y/2)^2; 

x[r_, t_] = r Cos[t]; 

y[r_, t_] = r Sin[t]; 

z[r_, t_] = f[x[r, t], y[r, t]]; 

surfaceplotter[r_, t_] = {x[r, t], y[r, t], z[r, t]}; 

hit = {0.36235, 0.93203, 4.1843 (where the light beam strikes the surface)

lightsource = {-1, 1, 6}; 

Your job is to plot the vector on which the reflected light moves.

I know how to get the normal vector but can't get the reflected vector. Let me know if you need additional information

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