If $G$ is a grammar with productions

$S$SaS$|aSb|bSa|SS|E$

Where $S$ is the start variable. Then which of the following strings nor generated by $G?$

a$).$ abab

b$).$ aaab

c$).$ abbaa

d$).$ babba

$5.$ How the concept of scope is implemented in C and Java. Explain with suitable codes. In simple terms, scope of a variable is its lifetime in the program. This means that the scope of a variable is the block of code in the entire program where the variable is declared, used, and can be modified.

$6.$ Write a program in Java and Python to demonstrate the addition of two matrices.