Mr Zhang used two printers with different printing rates for a printing job. He started Printer F at 16 39 and started Printer G two minutes later. He stopped both machines at 16 44. The graphs show the total number of pages printed by each printer from the start of printing.
- How many pages had been printed by Printer F at the time Mr Zhang started Printer G?
- What was the difference in the number of pages printed by the two machines from 16 39 to 16 44?
- Which printer, F or G, has a slower printing rate? What is the difference in the number of pages printed by the machines in one minute? Give your answer in this format. (Eg A, 1)