Today I received a big bag of yarn from a Goodwill store. Included in the bag was a sweater back and half of the front, cable pattern, and one size 8 knitting needle. The yarn is Red Heart Puff, and looks a few years old. There is enough yarn to finish the sweater, if I only knew how. There was no pattern. The back is knit straight up from the ribbing, no decreases for sleeves. The front appears to be made the same way. Would this be a sweater that sleeves are picked up and knit after the front and back are sewn together?