In this question, you will explore a semantic variation of function call and return.
A function can take an implicit parameter. Extend the Funclang language to support function calls that can optionally provide an implicit parameter, ‘this.’
The following interaction log illustrates the syntax and semantics of our desired extension:

Here, the function f is using the implicit parameter ‘this’ in its body:

In the function call, obj is being provided as the value of the implicit parameter ‘this’ to be used in the function body f.
Here are some more examples of defining and using such functions: