Write a C# program to randomly generate an array of 100 integer numbers ranging from 100 to 999.

(A) Identify the indexes of 3 largest numbers in the array using 3 variables. ( Use only comparisons. Cannot use sorting method for this request.)

(B) Identify the original indexes of ascending-sorted numbers in the array. You may use a sorting algorithm and another array for 100 indexes.

Display the original numbers using 10 lines with 10 numbers in each line. Then (A) answer and then (B) answer.