It really is hard to say because there are many slots and we do not know what your teacher is teaching. I have seen a lot of teachers teaching out of date material. With that said, here is a list from best to worst.
PCI Express x16
PCI Express x1
AGP
PCI
This is list is based on greatest to least and base on the bandwidth read and write speed.
Answer: The function Stella can use to calculate the periodic payments of a loan is:
The Excel PMT function or NPER function.
Explanation: 1. The Excel PMT function is a financial function that returns the periodic payment for a loan.
2. The NPER function to figure out payments for a loan, given the loan amount, number of periods, and interest rate.
A driver is a piece of software that allows things such as a keyboard, mouse, hard drive, etc. connect to a computer. Normally found on the manufactures website, you can update drivers with advanced and modern technology. Or, if a device is really old you can download a driver to allow that device to connect to a PC.