The document provides a rightmost derivation for the string (id + id) * id using a specific grammar. It illustrates the transformation steps from the initial expression to the final derived string. Each step follows the rules of the grammar to clearly show how the derivation is achieved.

1. Show a rightmost derivation for the string:
(id + id) * id
Using the grammer:
E -> E + T | E * T | T
T -> ( E ) | id
Solution
The rightmost derivation for the string is as follows:
E->E*T
E->E*id (Since, T->id)
E->T*id (Since, E->T)
E->(E)*id (Since, T->(E))
E->(E+T)*id (Since, E->E+T)
E->(E+id)*id (Since T->id)
E->(T+id)*id (Since E->T)
E->(id+id)*id (Since T->id)