Write a Python program that does the following:

Prompts you for a filename.

You enter lipsum$-$project$-1.$txt

Counts the number of each word, excluding punctuation and disregarding case, and then displays each single word on a line with the number of instances of that word as follows:

Interface $-23$

system $-41$

broadband $-12$

Calculate the average length of all the words used in this lipsum, excluding punctuation, both as an integer and as a floating$-$point number.

Calculate the total word count of this lipsum.

If an invalid filename is entered, or the file cannot be read for any reason, the program must output a graceful error message.

If the filename entered does not have a $".$txt$"$ extension, a graceful error message must appear that explains that.

All error messages must begin with the literal "ERROR $-"$