c$++$At the end of chapter $7,$ there are some problems that want you to use an array. I want you to use the class array that they talk

about in chapter $7$ to complete the following two problems.

Challenge $1$: $($Duplicate Elimination with array$)$ Use a one$-$dimensional array to solve the following problem. Read in $20$ numbers,

each of which is between $1$ to $20.$ As each number is read, validate it and store it in the array only if it isn't a duplicate of a number

already read. After reading all the values, display only the unique values that the user entered. Provide for the "worst case" in which

all $20$ numbers are different. Use the smallest possible array to solve this problem.

Challenge $2$: $($This next problem is not in this book but there is an example of using the binary search with the array class$)$

Use the class array to store the numbers of $10$ five$-$digit "lucky" combinations tickets. Write a program that initializes the class array

with the numbers of these $10$ lucky combination tickets and then lets the player enter this week's winning five$-$digit number. The

program should perform a binary search through the list of the player's numbers and report whether or not one of the tickets is a

winner this week. Here are the numbers:

$13579267912679233445555556248377777794228564793121$