X Company must purchase a new delivery truck and is using the payback method to evaluate two possible trucks. Truck X costs $34,000; Truck Y costs $50,000. The useful life of both is seven years, with the following estimated operating cash flows:

Year Truck X Truck Y

1 $-6,000 $-7,000

2 -8,000 -4,000

3 -8,000 -3,000

4 -8,000 -3,000

5 -6,000 -3,000

6 -5,000 -2,000

7 -4,000 -2,000

If X Company chooses Truck Y instead of Truck X, what is the payback period (in years)?

2 3 4 5 6 7