Suppose Xiomara has a utility function.:

u(x1,x2,x3) = 2(x1)^0.2 + min(x2,x3)

The prices of all three goods are identical at $2 per unit. Xiomara has no money to spend this month (Y= 0) but already has 2 units ofx₁, 4 units ofx₂, and 6 units ofx₃. If I give her a $10 gift certificate to spend ononeof the goods (to supplement the amount she already has), which good should she spend it on?