JavaScript Taskbook Level 1.7

Задание 1

Given a line:

javascript'abcde'

Get an array of letters from this string.

Задание 2

Given a certain number:

javascript12345

Get an array of digits of this number.

Задание 3

Given a certain number:

javascript12345

Turn it over:

javascript54321

Задание 4

Given a certain number:

javascript12345

Find the sum of the digits of this number.