Question 2.1, 2.3, 2.8 and 2.30 in java

remove the fhrst character! The last Chalacte R2.22 Write a program that prints the values 31000 1000 1000 3.0 1000 1000 1000 Explain the results. R2.23 This chapter contains a number of recommendations regarding variables and con- stants that make programs easier to read and maintain. Briefly summarize these recommendations. ROGRAMMING EXERCISES - P2.1 Write a program that displays the dimensions of a letter-size (8.5 x 11 inches) sheet of paper in millimeters. There are 25.4 millimeters per inch. Use constants and com- ments in your program. P2.2 Write a program that computes and displays the perimeter of a - P2.3 Write a program that reads a number and displays the square, cube, and fourth P2.4 Write a program that prompts the user for two integers and then prints inches) sheet of paper and the length of its diagonal. letter-size (8.5 11 power. Use the Math.pow method only for the fourth power. . The sunm The difference