help me ASAP with this Matlab Program code with detail plzz!

In Matlab complex arithmetic expressions can be formed using the following operators Function COS sin tan ex abs ine ne Tangent Exponential Absolute value (magnitude for complex numbers) le Phase The function listed below are very useful in signals and systems and are also defined in MATLAB Function cOS sin tan exp ine ne Tangent Exponential abs Absolute value (magnitude for complex numbers) angle Phase See also the MATLAB manual for more functions. As an example, cos(x) returns a vector of the same length as x, containing the cosine of the elements in x. A function can be plotted using the command plot(x,y); where y contains the values of the function evaluated at the data points contained in x a) Plot the function f(x)6in(a2), where x is in the range -3 to 3. Use increments of 0.02 (a) Plot the function f(x)6sin(z2), where z is in the range -3 to 3. Use increments of 0.02. b) Define g(x)-4cos(r. Plot the function g(x) +f(x) as well the function g(x) - f)