How to share internet over WiFi?

Question

Computer networks

Hello!
The task is to distribute the Internet, received via a 4G USB modem, via WiFi.
What I have:
1. Computer based on Windows 7
2. 4G USB modem from Huawei (HiLink) connected directly to the computer
3. WiFi router TP-LINK TL-WR840N connected to the computer via ethernet cable
Two networks appeared in windows: one with Internet access, the other without.
Now, there is Internet on the computer, but it is necessary to distribute this Internet via WiFi. Question - how?

Answer 1

on the router - gate on the computer (router port / address / WAN)
on the computer something like that
one
more time

Answer 2

Control Panel > Network and Sharing Center > View network connections.
Then right-click on the properties of the mobile connection. Click the Sharing tab and then select Allow other network users to connect through this computer's Internet connection.