faster please and i hope to like you

Which of the following represent a function of the Operating system: Question 23 Not yet answered Marked out of 1.00 O a. Schedule programs for execution O b. All of the mentioned O c. Manage system resources O d. Interface with users P Flag question Question 24 The extension in ext.xls is: Not yet answered Select one: Marked out of 1.00 O a. ext ob.exe Flag question O c. xls d. xt.xls