Q$1$: Email Builder $-30$ pts

The file associated with this question is

EmailBuilder.py$.$

Write a function build$\_$email$($firstname$,$ lastname, entry$\_$year$)$ such that:

firstname is the first name of the student $($string$)$

lastname is the last name of the student $($string$)$

entry$\_$year is the year the student entered Ko$$ University $($string$)$

The function returns the e$-$mail address of the student, which is built by concatenating:

First letter of the student's first name

Student's last name in full

Last two digits of student's year of entry

$$@KU$.$EDU.TR$"$

The returned e$-$mail address should be completely in uppercase.

You must check for the following erroneous inputs:

First and last names should only contain letters from the English alphabet. No numbers,

no punctuation, no empty spaces. First and last names cannot be empty.

o If this rule is violated, build$\_$email should return $"-1".($string$)$

Year of entry should be a valid year: no letters, no punctuations. Also, year of entry must

be $2001$ or later.

o If this rule is violated, build$\_$email should return $"-2".($string$)$

If both rules are simultaneously violated, build$\_$email should return $"-1".($string$)$

Examples:

$,$ firstname $=$ "John", lastname $=$ "Doe", entry$\_$year $="2020"$

return value $$JDOE$20$@KU$.$EDU.TR$"$

firstname $=$ "Jane", lastname $=$ "Smith", entry$\_$year $="2005"$

return value $"$

JSMITH$05$@KU$.$EDU.TR$"$

firstname $=$ "John$-$Marcus", lastname $=$ "Doeington", entry$\_$year $="2010"$

return value $"-1"$

$,$ firstname $=$ "James", lastname $=$ "Cool", entry$\_$year $="1998"$

return value $"-2"$