Serena is trying to figure out how best to spend $26. There are three items she is purchasing. Use the table below to answer the following questions. Tennis Balls $2 each Headbands $4 each Wristbands $6 each Units TU MU MU/$ TU MU MU/$ TU MU MU/$ 1 40 72 10 72 72 10 2 76 44 116 44 8 3 100 28 144 28 7 4 110 20 5 156 20 5 5 115 2 160 4 2 Fill in the missing cells in the table above What combination of goods should Serena purchase to maximize her utility with her $26 budget? . What is the total utility Serena will get from her purchases in part b