Write a subroutine in C# called checkTreasure that will count the number of treasure chest symbols ('T') on a map grid.

An example of the 2D array islandMap is shown in Figure 1.

Figure 1

The subroutine should:

• take the 2D array islandMap of characters as a parameter
• count the number of 'T' characters in the islandMap array
• output the word Jackpot if there are five or more 'T' symbols in the array
• output the total number of 'T' symbols if there are fewer than five 'T' symbols in the array.

You must write your own count routine and not use any built-in search or count functions that might be available in C#.

You should use meaningful variable name(s) and C# syntax in your answer.