Olivia is at a toy store and is buying toy T-Rex's (r), which cost pr, and toy yaks (y), which cost py. Her income is /. She likes 2 T-Rex's as much as she likes 3 yaks. These toys are perfect substitutes for her.22. Depending on the price ratio PE, what are the Marshallian demands? (4 Points) for Pr 19149 (b) Py _ and y* = 0 for Py * = 0 and y* = _ for B: > Pu = _ and y* = 0 for Re (c) Py 19149 616: * = 0 and y* = _ for B: > Pu x* = 0 and y" = _ for (d) Py IN e19 * = _ and y* =0 for B: >