adding a file about_arrays.js to work with arrays
adding results returned by the given function of arrays
adding object as an answer to the given scenario
adding 3 which is the length of the given array
adding 0 and 5 to splice the array
adding 5 and 2 as values for workingWeek and daysOfWeek respectively
adding second and first as values popped out of stack
adding third and first which are the values shifted from queue