java pseudocode and source code help?

Write a program that uses an array of high temperatures for your hometown from last week (Sunday - Saturday). Write methods to calculate and return the lowest high temperature (minimum) and a method to calculate and return the highest high temperature (maximum) in the array. You must write YOUR ORIGINAL methods for minimum and maximum. You MAY NOT use Math class methods or other library methods. Write an additional method that accepts the array as a parameter and then creates and returns a new array with all the same values as the original plus 10. (num +=10)