The answer of Question 2:
You can firstly derive the price of X by using: 4*$8 + 6* Px = 104. Then you have Px=$12, from which you can derive the function of the budget line : 12X+8Y=104.
Next, you need to find out a point on the X axis and a point on Y axis, then connect them. The connected line is the budget constraint line of that consumer.
To derive a point on the X axis: let Y=0, then X=26/3, which means if the consumer spend all her budget on buying x, then she can get 26/3 units of X, so the point is (26/3, 0)
To derive a point on the Y axis: let X=0, then Y=13, which means if the consumer spend all her budget on buying Y, then she can get 13 units of Y, the point is (0, 13)
Just connect this two points you have derived.
PS: The consumer can choose any bundle on the budget constraint line.
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