List any three importance of computer

Aletter or menu command that starts an action when the user presses the designated letter and the alt key together is called what?

Assume that you have an sorted array of records. assume that the length of the array (n) is known. give two different methods to search for a specific value in this array. you can use english or pseudo-code for your algorithm. what is the time complexity for each algorithm and why?

How do we use the sumif formula (when dealing with different formats) ?