4. (30) Consider programs consisting of two parts

(a) The first part has only one function declaration: functionName(parameterList) where functionName is an identifier (i.e., a sequence of letters) and parameterList is of the form type id1, type id2, , type idn, where type is int or bool, and idis are identifiers. An example of a function declaration is f(int x, bool y)

(b) The second part has only a function call of the form functionName(argumentlist) where argumentlist is of the form id1, id2, ..., idn where idis are identifiers. For example, f(x, z) An example program is f(int x, bool y) f(x, z)

(1) Given a program f(int x, bool y) f(x) Explain how the semantic rule of The number of parameters of a function call has to have the same number of parameters as that of the declared function can be checked using the decoration of the parse tree.