Can i get a java code for this assignment and a very detailed explaination on the solution Write an example code that contains common sub expression $($Programme$-1).$ Rewrite the code to eliminate the common sub expression $($Programe$-2).$ Code both these programmes in any programming language of your choice. Run this programmes in your computer$/$laptop and measure the execution time, memory usage and compare them. $(3$ Marks$)$

Briefly illustrate the process of using inference rules for type checking with example. $(2$ marks$)$