1. Write a method that finds the biggest element of an array. Use that method to implement sorting in descending order. 10. Write a program that calculates and prints the n! for any n in the range [1...100].
2. Write a program that solves the following tasks:
- Put the digits from an integer number into a reversed order.
- Calculate the average of given sequence of numbers.
- Solve the linear equation a * x + b = 0.
Create appropriate methods for each of the above tasks
Make the program show a text menu to the user. By choosing an option of that menu, the user will be able to choose which task to be invoked.
Perform validation of the input data:
- The integer number must be a positive in the range [1...50,000,000].
- The sequence of numbers cannot be empty.
- The coefficient a must be non-zero.