Python Taskbook Level 2.10

Задание 1

Given a string of letters and numbers, check that there are no more than three letters in this string.

Задание 2

Given a number, get the first even digit from the end of this number.

Задание 3

Given a string:

python'abcde abcde abcde'

Replace the first character of each word in it with '!':

python'!bcde !bcde !bcde'

Задание 4

Given a list of strings containing integers:

python['1', '2', '3', '4', '5']

Find the sum of the elements of this list.