You can now run this program from the command line. The program takes four command$-$line arguments. These arguments are the values of four consecutive bytes $($in hex$)$ of memory from which the program will construct both big$-$endian and the little$-$endian integers. For example, to see the value of the integer whose byte values are $0$x$01,0$x$02,0$x$03,$ and $0$x$04,$ in that order, you would type:

java Endianness $01020304$

Write the code that transforms this memory into integers by replacing the TODO's with an implementation of bigEndianValue and littleEndianValue.

Important Note: You must write these two methods using only the Java built$-$in types and their operators $($i$.$e$.,+-$ & $|>>>>><<).$ You may not use any part of the Java library.