1. Write a program that takes a two digit number and prints the number backwards. Write a program that inputs the radius of a circle as integer, the pi as a constant of type float and prints the...

Java...run with eclipse

Extracted text: 1. Write a program that takes a two digit number and prints the number backwards. Write a program that inputs the radius of a circle as integer, the pi as a constant of type float and prints the diameter, area and circumference of the circle. Use the following formulas: diameter = 2 * radius circumference = 2 * pi * radius area = pi * radius? Write a program that takes a five digit number and prints the number with space between. For example: if the number is 23467, the program prints 2 3 4 6 7. Write a program that reads a String of 6 characters, use the length() to determine the length of the string and charAt() to print each character separately.