Matthew, Richard, and Christopher would like to exchange messages with each other using symmetric cryptography. They want to ensure that each individual can privately send a message to another individual without the third person being able to read the message. How many keys do they need?

Answer the following statements true (T) or false (F)

1. An individual array element can be processed like any other type of C++ variable. 2. In C++11 you cannot use a range-based for loop to modify the contents of an array unless you declare the range variable as a reference variable. 3. In C++11 the range-based for loop is best used in situations where you need the element subscript for some purpose. 4. Although two-dimensional arrays are a novel idea, there is no known way to pass one to a function. 5. Each individual element of an array can be accessed by the array name and the element subscript.

Describe what a public access class is and when you would use one. 

What will be an ideal response?