For the laptop screen I use a cloth that is only just a little damp and I wipe it very carefully - laptop screens are delicate. Then I dry it with a clean dry towel.
Write a program to print the following series 1-4 7-10 13-16 19-22. Can you guess what does the question mean? AP: 1,4,7,10 or something like 1,2,3,4....7,8,9,10..... If you are free.