please help me with this Mahtlab workshop u can use octave if u want

complete exercise 7.5 plsease I need the code

1. Find the maximum of the following function by symbolic computation. f(x,y)=a+bexp((xmx)(ymy)) 2. Write a function which calculates the n-th derivative of an input function with respect to a certain argument of that function. Both, the input function and the function argument should be passed as strings (instead of symbols or symbolic expressions). Note: you can use the findsym function to search for all symbols within the input strings. 3. The MATLAB inline function allows you to create a function from a string. For example, >fun=inline(exp(t)sin(wx))fun=Inlinefunction:fun(t,w,x)=exp(t)sin(wx) creates the inline function fun(t,w,x) with three input arguments. Extend your symbolic derivative function such that it also returns the derivative as an inline function