For this programming assignment your job is to write a one class stand-alone app

Question

For this programming assignment your job is to write a one class stand-alone application called AvLetter that reads in a phrase from the keyboard, and then prints the "average" letter in the phrase.


What do we mean by the average letter in a phrase? Surely, in the phrase "abcde" the average letter should be c -- the a and the e average to c, and do the b and the d. Similarly, in the phrase "az", the average should be (and is) m, which is half way between a and z.
Notice that a phrase can contain blanks, punctuation, digits, etc. -- you should skip these. Only letters matter for this problem. Also, you should convert the phrase to all lower case before you begin your analysis.
Here is how you should proceed: every letter has a "position" in the type char, and you can find that position by casting the letter as an int. So you should traverse the String (input phrase, all lower case) from beginning to end, and whenever you come to a letter, cast it as an int and add this cast value to an accumulator variable. Then, when you've finished processing the String, divide the accumulated values of the letter by the number of letters you've seen. This division should be an integer division so the result will be an int. Cast this value back to a char to get the sought-after average.
An Example
Suppose the entered string is
Hi Sy!
First this is converted to lower case. Then the string is examined, character by character, left to right. The blank and the ! are skipped. These are the int values of the letters:
h = 104
i = 105
s = 115
y = 121
These sum to 445. Dividing by 4 yields 111, and (char)111 is 'o'
And here is the interaction from the running program:
> run AvLetter
enter a phrase
Hi Sy!
average is: o
>
Your solution should include comments that narrate the actions that take place in your solution.

Please we are using java to write this program.

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