4.5) MATLAB Exercises 1. Create a function which returns the average of given input vector.

2. Create a function which computes the binomial coecientn k= n! k!(nk)!.

3. Create a function which plots sin(x) for a given input frequency in the range 0 x 2.

4. Create a function which plots the surface dened by sin(1x)cos(2y) in the range 0 x,y 2.

You can use the meshgrid function to create the x and y matrices.