The contractors Brent and Garth always start their jobs at 9:00am. If Brent works alone, he will finish at 5:00pm, including an hour-long lunch.If Garth works alone, he will finish at 5:00pm, including an hour-long lunch. If they work together, they will have an hour-long lunch instead. Assuming the rate at which they work stays the same, at what time in the afternoon will they finish? Please give the answer in the 12-hour format xx:yy, rounded to the nearest minute (e.g.02:12).
