Elena, Joe, Owen, Samantha, and Tuck have weighed their backpacks.

• Elena's backpack weighs the most.
• Owen's backpack weighs 0.45 lb less than Joe's backpack.
• Samantha's lunch weighs 1.5 lb. With that lunch out of the backpack, the backpack weighs 16.55 lb.
• Tuck's backpack weighs more than Owen's.