Create a new binary variable named success that is equal to 1 if a leader dies from the attack and to 0 if the leader survives, using the `levels()` and `ifelse()` functions from lecture 9. Store this new variable as part of the original data frame. What is the overall success rate of leader assassination

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.