GE Profile Dryer needs Drum Slides

I have a GE Profile Dryer M/N: DNXR473EW0WW that squeeks when it runs. I looked and the Drum Slides are worn out.

Checked the parts map but there appears to be 2 different slides available.

I think there is 4 slides in all. Can you explain what how many of what parts I need?

If the parts are different, what order do they go in?

Here are your parts.
Replacement parts for General Electric DNXR473EW0WW Electric dryer | AppliancePartsPros.com
Slides are 316 in Section 2.

AP7217723
Click on the picture to open another page with more info.
It has a Q&A section.

Replace all 4 slides, usually 2 green and 2 white,

You may as well check the following for wear and slop and give it a bit of an overhaul since you have it apart.
Belt, idler wheel, rear support bearing, motor bearings, all seal in the air flow path, drum seals etc.
Pay special attention to the rear support bearing this is a common weak point in this dryer design.
Give the interior a good cleaning including the blower wheel.
Also a good time to check/clean your vent system.