Assume the following:
- An equipment room (ER) consists of 16 racks arranged in 4 equal rows
- The first 4 racks are numbered R1-1 though R1-4
- The second 4 racks are numbered R2-1 through R2-4
- A new equipment shelf with 12 slots is to be installed in the bottom of the third rack in the second row
- Each slot has 2 ports
What would be the identifier of the two ports on the eighth slot of the new equipment shelf?