Placing Text in Columns in CSS

Задание 1

Given a div with a width of 80%, make the text in this div line up in columns with a width of 300px.

Задание 2

Given a div with a width of 1000px, make the text in this div line up in four columns.

Задание 3

Modify the previous problem so that the distance between columns is 30px.

Задание 4

Modify the previous problem so that there is a dotted gray border between the columns.