Explain how to assign a value to a specific array element and how to print it.

What will be an ideal response?

When you work with any individual array element, you treat it no differently than you treat a single variable of the same type. For example, to assign a value to the first sales in an array, you use a simple assignment statement, such as the following:
sales[0] = 2100.00;
To print the last sales in a 20-element array, you write:
WriteLine(sales[19]);