Write a single C statement or line that accomplishes each of the following:a) Print the message “Enter two numbers.”

I need the A, B, C answers. Thank you sooo much !!

b) Wnite a C++ program, which uses a 'switch' statement to respond to different inputs from a user. The user may enter either 1, 2 or 3. If the input is 1, the program asks the user to input two numbers, which correspond to the length and width of a rectangle. The program then calculates the area of the rectangle and outputs the result by displaying the message "This is a rectangle. Its area is: Vvalue. If the input is 2, the program prints out the message "This is a triangle". If the input is 3, the program prints out the message "This is a circle"

Irvine Ranch Water District (adapted from irwd.com)Write a C++ program to estimate your water bill for next month. Your water meter measures the volume of water you use in hundreds of cubic feet (CCF). One CCF of water equals approximately 748 gallons. INPUTAll input statements and their user prompts need to be in main() since only pass by value is being used in this lab. Your program is to prompt the user for: Number of residents in household (integer > 0) Integer number between 1 to 12 inclusive for the month of the year. Number of days in billing cycle Type of residence (user to enter character as follows):S – Single-family ResidenceC – CondoA – Apartment Program should not be case-sensitive. That is if user enters a lowercase ‘s’ your program is to treat it as an uppercase ‘S’ either by using toupper() function or through ‘if’ statement. If user enters a negative number for the number of residents, output an error message and exit the program. If the month is entered out of…