(True/False) Only existing operators can be overloaded.

(Rectangle Class) Create class Rectangle. The class has attributes length and width, each of which defaults to 1. It has read-only properties that calculate the Perimeter and the Area of the rectangle. It has properties for both length and width. The set accessors should verify that length and width are each floating-point numbers greater than 0.0 and less than 20.0. Write an app to test class Rectangle. THIS IS C#

[SHORT ANSWER] Write three separate if blocks and using appropriate logical operator (and, or, not) to check the following three separate conditions (number your answers):1. If the character variable lastAlphabet is Z or z, print the message: Last Alphabet!2. If the variable daysOfWeek is outside the range O through 8 (including both those days), print the message: Invalid Day!3. If the variable monthsOfYear is inside the range 1 through 12 (including both those months), print the message: Valid Month!

(Java) The greatest common divisor of two positive whole numbers and n1 and n2 is the largest number g such that g evenly divided into both n1 and n2. Write a complete program that takes two positive whole numbers from the user and displays the common divisor.

[In C#] Write an application named SumInts that allows the user to enter any number of integers continuously until the user enters 999. Display the sum of the values entered, not including 999. using System; using static System.Console; class SumInts {    static void Main()    {     // Write your main here.    } }