Write a method that accepts a string called 'origNum' and a base called 'origBase'. Your goal is to return the value of 'origNum' in base 10. The ONLY string methods you may use are: .length, .charAt, and .equals. You are NOT allowed to use any other classes. As preconditions, you may assume that 'origNum' ONLY contains valid digits in 'origBase'. You may also assume that origBase is between 2 and 36 inclusive. All letters will be capitalized. The only characters in 'origNum' will be 0-9 and A-Z, but ONLY up to the maximum valid digit in 'origBase'. You may also assume that the resulting number in decimal will be less than the maximum positive integer value. Look at the test data for examples.