Need help with volt/amper meter

Hello everyone,

I saw this project, and decided to build it. https://electrosome.com/voltmeter-ammeter-pic/

Now it works fine and everything but can someone add the wattage and resistance measuring.

Since the source code is on the website, I think it won’t take too much time for someone knowledgeable to change it.

Here is a pic how I want it to be (if someone can make it that is):

But resistance measure instead of the ampere/hour

Thanks in advance!