If $f(x,y)=xy,$ find the gradient vector gradf$(3,2)$ and use it to find the tangent line to the level curve $f(x,y)=6$ at the point $(3,2).$ Sketch the level curve, the tangent line, and the gradient vector.

If $g(x,y)=x^2{y}^2-4x,$ find the gradient vector gradg$(1,2)$ and use it to find the tangent line to the level curve $g(x,y)=1$ at the point $(1,2).$ Sketch the level curve, the

tangent line, and the gradient vec

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Please, try to explian it to me exactly $,$ I can not understand it