Write a sketch to create the following countdown timer. You MUST use timer interrupts.  At startup, the serial monitor will display: "Enter an integer between 5 and 20: " and record the user’s input as N. If user enters an integer outside this range or a non-integer, the program will display "Try again: " and wait for user input, N.  At 1 second intervals, the serial monitor will display, N, N-1, … (e. g. 16, 15, 14, … ) down to 0, and then stop.  In the middle of a countdown (before it reaches 0), if the user types "Pause", the countdown will pause (e. g. at the value M). It will resume again (from M) only when the user types "Resume". If the user types "Pause" or "Resume" after a countdown is complete, the program will display "No countdown in progress".  At any time (during a countdown, after a countdown is complete, or in the paused state), if the user types "Restart", it will restart the countdown from N.

This question involves a class named textfile that represents a text file. public class textfile { private string filename; private string filename; private arraylist words; // constructors not shown // postcondition: returns the number of bytes in this file public int filesize() { } // precondition: 0 < = index < words. size() // postcondition: removes numwords words from the words arraylist beginning at // index. public void deletewords(int index, int numwords) { } // precondition: 0 < = index < = words. size() // postcondition: adds elements from newwords array to words arraylist beginning // at index. pub lic voidaddwords(int index, string[] newwords) { } // other methods not shown } complete the filesize() method. the filesize() is computed in bytes. in a text file, each character in each word counts as one byte. in addition, there is a space in between each word in the words arraylist, and each of those spaces also counts as one byte. for example, suppose the words arraylist stores the following words: { mary had a little lamb; its fleece was white as snow. } the filesize() method would compute 4 + 3 + 1 + 6 + 5 + 4 + 6 + 3 + 5 + 2 + 5 as the sum of the lengths of each string in the arraylist. the value returned would be this sum plus 10, because there would also be 10 spaces in between the 11 words. complete the filesize() method below: // postcondition: returns the number of bytes in this file public int filesize() { }

The keyboard usually has six rows of keys. which of the following is not one of the key group categories? letter keys number keys control keys graphic keys

100 pts. first person gets brainliest