In the lectures we saw that clisps implementation of apply does not have a context argument, but the general Lisp apply takes 3 arguments: a function, a list containing the arguments the function is to be applied to, and a context. A context is a list of variable value pairs represented as a list.

For example ((x 1) (y (+ 1 3)) represents a context where x is 1 and y is 4. Write a Lisp macro (my-apply func arglist context) which applies the function func to argument list arglist, using context as needed.

For example:

(my-apply + (1 3) ((x 1) (y 2))) 4

(my-apply (lambda (z w) (+ (* x z) (* w y))) (1 3) ((x 1) (y 2))) 7