This program exercises your understanding of containment, composition and class maintenance Additionally, you MUST use Programming By Contract. The goal is to design and implement the C# classes needed to implement comparative data sets, as described below.

Design and implement two classes, each of which encapsulate distinct closePrime objects.

- The first type, sameLastDigit, uses 2 closePrime objects to identify all pinged values that yield stepped primes with the same last digit. For example, if a trigger object encapsulated closePrime objects with hidden digits 2 and 5 then a pinged value of 81 would satisfy this criterion (2 steps away: 83, 89 => 97; 5 steps away: 83, 89, 97, 101, 103 => 107) while a pinged value of 78 would not. Cumulative statistics may also be released.

- The second type, multiPrime, tracks some number of closePrime objects at a given time and returns the maximum and minimum stepped prime resulting from a query across all encapsulated closePrimes. Supports cumulative statistics Adds/Removes closePrime objects