need help with this Matlab Assignment. Please try to formulate the Matlab code and post it here. Please make sure it works. 

Matlab Assignment 

Problem 4.1 (15.6 #36); Problem 4.2 (Supp 4.3 #2(b)) 

• The code used to solve the problems should include as little manual input as possible. 
• The output for Problem 4.1 should include both parts of the problem: (a) the linear approximation of f (tangent plane) and (b) the estimated function value. 
• The graphs for both Problems 4.1 and 4.2 must include the surface, the point of tangency, and the tangent plane. Use a solid 'facecolor' to distinguish the tangent plane from the surface. 

Problem 4.1 is: Linear approximation

1. Find the linear approximation to the function f at the given point.
2. Use part (a) to estimate the given function value. 

36. f(x, y) = sqrt(x^2 + y^2); (3, -4); estimate f(3.06, - 3.92).

 

Problem 4.2 is: Tangent plane

 

2. Find an equation of the plane tangent to each surface at the given point.

 

        b.  r(u, v) = <1 - 3u 2v, uv, v^2>; (-4, -1, 9).