Suppose we change the Tiger language to use Ada's copy-in-copy-out parameter passing mechanism. If a parameter is declared with the keywords in out, it uses copy-in-copy-out. Otherwise, we use call-by-value as before. With copy-in-copy-out, the argument is copied into the parameter variable on entering the function. On function exit, the parameter is copied back out into the argument vari- able. Describe in detail which changes (if any) are necessary to semantic analysis, escape analysis, activation records, and the intermediate representation. 2. Draw the intermediate code trees for questions 7.1(f), 7.1(h), 7.2(g), 7.2(G) on p. 160 7.1 Suppose a certain compiler translates all expressions and subexpressions into Tree. Exp trees, and does not use the Nx and Cx constructors to represent expressions in different ways. Draw a picture of the IR tree that results from each of the following expressions. Assume all variables e, a