$($Java Programming$)$ Write two Java methods: one to convert a $2$s complement binary

number to decimal and another to do the reverse. Your code must implement the steps

of one of the algorithms presented in class. DO NOT use any java methods which do

decimal$-$to$-$binary or binary$-$to$-$decimal conversion for you. You should not use any data

structures and should not use a String $($or StringBuilder$)$ to perform an unnecessary

intermediate conversion between the int and char$[].$ If your code uses predefined

methods to do the conversion such that you fail to demonstrate a step$-$by$-$step

understanding of the algorithms presented in class, then you will lose at least half of the

points for the programming portion of this assignment. The method declarations are

provided below. You may create private helper methods to remove any redundancy, if

you wish, but the public method signatures below must not be changed