Define a function called double_evens, which takes as an argument a list of numbers. complete the function to return a list with every even value in the list doubled. you can either create a new list or return the original list modified. (if you are modifying the existing list you might want to use the enumerate function to get the list indices.) for example, given the input [1,2,4,5], the function should return the list [1,4,8,5].

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.