A computer uses the following interfacing protocol for the keyboard: when the end user types a character on the keyboard, the keyboard controller sets the LSB of its 8-bit status register (label keybd status) to 1 and updates the data register (label keybd data) with the ASCII code of the typed character. The device driver resets the status bit to 0 after reading the character. (a) (1 point) What type of IO transfer scheme is employed in this interfacing protocol

Write a method public static string getdigits(string phonenumber) that takes an 11-character phone number written with any combination of 11 uppercase letters, lowercase letters and/or digits, and zero or more hyphens, and which returns the digits that a person would have to press on a cell phone to dial that phone number. we will use the mapping of letters to digits given at en.wikipedia.org/wiki/telephone_keypad# /media/file: telephone-keypad2.svg you may assume that the string parameter phonenumber contains some combination of exactly 11 uppercase letters, lowercase letters and/or digits, but that any number of hyphens may be present. you can assume that a hyphen will not appear as the first or last character of the string. do not assum