Please help im on a final

Which one of the following is considered a peripheral? a software b mouse c usb connector d motherboard

Jason works as an accountant in a department store. he needs to keep a daily record of all the invoices issued by the store. which file naming convention would him the most? a)give the file a unique name b)name the file in yymmdd format c)use descriptive name while naming the files d)use capital letters while naming the file

On early television stations, what typically filled the screen from around 11pm until 6am? test dummies test patterns tests testing colors