I need help with Java Program1:

Write a Java program that has the following methods.

?findSumMethod that takes three integers and returns the summation of them.

?findAverageMethod that takes three integers and returns the average of them.

Within the main method, take 3 integers from the user and call above methods by passing those values.

I need help with Java Program2:

Write a Java program that takes the marks (an integer) from the user and display the relevant grade for that marks according to the following ranges.

Your program needs to have a separate method called findGrade which takes the marks as the input value and return the relevant grade.

I need help with Java Program3:

Write a Java program that takes the first name and the last name from the user and display the full name of the user as a combination of first name and the last name.Your program needs to have a separate method called findFullName which takes the first name and the last name as the input values and display the full name.

I need help with Java Program4:

Write a Java program that overload the method called findMinimum based on following options.

?- Minimum of two integer numbers.

- Minimum of three integer numbers.

? -Minimum of two decimal numbers

Marks Range Grade 80 S Marks 75 S Marks