Implement the fetch$()$ method for the fetch phase of a fetch$/$execute cycle. If you are following along in the unit test file, you will see there are unit tests before the fetch$()$ unit tests to test the loadProgram$()$ function. You have already been given all of loadProgram$(),$ but you should read over this function and see if you understand how it works. Your implementation of fetch should be a simple single line of code if you reuse your peekAddress$()$ function. Basically, given the current value of the PC$,$ you want to use peekAddress$()$ to read the value pointed to by your PC and store this into the IR instruction register. How do I write the code?