I need help with a Java program1:

The following steps (pseudo code) describe how to check a given lengths of three sides of a triangle forms a valid triangle or not. Use if-else statement.

a.Read lengths of three sides and store them three int data type variables called sidea, sideb and sidec. (Assume the lengths are integers)

b.IF sidea + sideb > sidec AND sidea + sidec > sideb AND sideb + sidec > sidea

THEN

OutputThis is a valid triangle

ELSE

Output This is NOT a valid triangle.

I need help with Java Program2:

Write a Java program that takes three numbers from the user and output the largest number and the smallest number among them. Use nested if-else statement.

For example, if user enter 2,3,5 then,

Largest number = 5

Smallest number = 2

Do not use Math.max and Math.min methods.

I need help with Java Program3:

Write a Java program that takes a number between 1 and 12 from user and output the corresponding month names January, February, March,...,December. If user enters any other number than 1-12, display an error message.Use switch-case statement.