/**
* valRange returns the difference between the maximum and minimum values in
* the array; Max-Min.Precondition: the array is nonempty.Your solution must
* go through the array at most once. Here are some examples (using "=="
* informally):
*
* <pre>
* 0 == valRange (new double[] { -7 })
* 10 == valRange (new double[] { 1, 7, 8, 11 })
* 10 == valRange (new double[] { 11, 7, 8, 1 })
* 18 == valRange (new double[] { 1, -4, -7, 7, 8, 11 })
* 24 == valRange (new double[] { -13, -4, -7, 7, 8, 11 })
*
* The code below is a stub version, you should replace the line of code
* labeled TODO with code that achieves the above specification
* </pre>
*
* @param list
* @return
*/
public static double valRange(double[] list) {
   // the array is nonempty

   // set the first value of the list to the result of the funstion
   double minVal = list[0];
   double maxVal = list[0];

   // move to theend of the array
   for (int i = 1; i < list.length; i++) {
         double d = list[i];
         // update max and min value
         if (d > maxVal) {
            maxVal = d;
         }
         if (d < minVal) {
            minVal = d;
         }
   }

   // get difffence between the maximum and minimum values
   return maxVal - minVal;
   //return -1; //TODO 1: fix this

}

/**
* posOfLargestElementLtOeT returns the position of the largest element in
* the array that is less than or equal to the limit parameter if all values
* are greater than limit, return -1;
*
* Precondition: the array is nonempty and all elements are unique.Your
* solution must go through the array exactly once.<pre>
* 0 == posOfLargestElementLtOeT(3, new double[] { -7 })                   // value:-7 is in pos 0
* 5 == posOfLargestElementLtOeT(3, new double[] { 11, -4, -7, 7, 8, 1 }), // value:1 is in pos 5
* -1 == posOfLargestElementLtOeT(-7, new double[] { 1, -4, -5, 7, 8, 11 }), // all elements are > -7
*
* The code below is a stub version, you should replace the line of code
* labeled TODO with code that achieves the above specification
* </pre>
*
* @param limit
* @param list
* @return
*/

You will need to 1. create a java class using this source file,...