Write a program with an array that is initialized with test data. Use any primitive data type of your choice. The program should also have the following methods: 

• GetTotal. This method should accept a one-dimensional array as its argument and return the total of the values in the array.
• GetAverage. This method should accept a one-dimensional array as its argument and return the average of the values in the array.
• GetHighest. This method should accept a one-dimensional array as its argument and return the highest value in the array.
• GetLowest. This method should accept a one-dimensional array as its argument and return the lowest value in the array.

Demonstrate each of the methods in the program.