- LJ 4. Consider the alphabet {a,b,c} and the language over this alphabet consisting of strings with the following properties: o a's appear before b's and b's appear before c's, and o the number of a's, b's, and c's are equal. Examples of strings in the language are aaabbbccc, aabbcc, abc, etc. Write an attribute grammar for this language. You will solve this problem in 2 steps: o Step 1: Write a context free grammar for the language in which the a's appear before b's and the b's appear before c's. This grammar need not consider the second condition that the number of a's, b's, and c's are equal (In fact it is impossible to construct a context free grammar to satisfy the second condition). o Step 2: Introduce attributes for non-terminals in your grammar and define the attribute computation functions and predicates to enforce the second condition