Measure the time to execute the 4 sample programs (Sample1,2,3,4.c) Measure the time it takes to print a 10000-character string: - using "write()" to write to the screen, one character at a time. - using "write ()" to write to the screen, all 10000 characters at once. - using "printf ()" to print to the screen, one character at a time. - using "printf ()" to print to the screen, all 10000 characters at once.