Answer :
1. Yanira could be 7, Tim could be 4, and Hannah could be 2.
2. Yanira could be 5, Tim could be 3, and Hannah could be 1.
3. Yanira could be 8, Tim could be 5, and Hannah could be 3.
4. Yanira could be 20, Tim could be 17, and Hannah could be 15.
2. Yanira could be 5, Tim could be 3, and Hannah could be 1.
3. Yanira could be 8, Tim could be 5, and Hannah could be 3.
4. Yanira could be 20, Tim could be 17, and Hannah could be 15.