Justify your answer. (unknown implies that neither true nor false assertions are valid). (a) True/False/Unknown. Ambiguity in grammar always leads to ambiguity in the semantics of the language generated by the grammar. (b) True/False/Unknown. There can be two grammars G1 and G2 with different number of produc- tion rules and L(G1) = L(G2). (c) True/False/Unknown. In any programming language, if a function does not have any formal parameters and only uses local variables in its definition, then its behavior remains identical irrespective of its calling context. (d) True/False/Unknown. A programming language, which does not allow declaration of variables that is not local to some function, cannot use static scoping. (e) True/False/Unknown. For the interpretation of function calls, we assign the formal parameters to the valuations of the actual arguments. The interpretation can be used to realize call-by-value. call-by-pointer and call-by-reference (as is done in C++) by appropriately altering the type of the formal parameters and the actual arguments.