Write a c++ program that ask a user to enter his name and birthday (/mm/dd). if the age is greater than 21 print "welcome," and if the age is less than 21 print "sorry." use input validation to make sure the birthdate was entered correctly.

Which best explains why a digital leader would join a society specializing in technology

In excel - calculate the actual increase/decrease from first quarter to the second quarter then subtract subtract first quarter value from second quarter total then divide result by first quarter value

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.