Create an appropriately named method to: input the amount the user is investing (principal) calculate one year of interest at a rate of 7% (the formula is quite simple, interest is the amount invested times 0.07) output the interest be aware that any variables required by the method must be declared in the body of the method, not after start like we have been doing up to now. call the method in the main code body (the code between start and stop).

Use a physical stopwatch to record the length of time it takes to run the program. calculate the difference obtained by calls to the method system.currenttimemillis() just before the start of the algorithm and just after the end of the algorithm. calculate the difference obtained by calls to the method system.currenttimemillis() at the start of the program and at the end of the program so that the elapsed time includes the display of the result. use the value returned by the method system.currenttimemillis() just after the end of the algorithm as the elapsed time.