a. Will Najib now be able and want to buy five bottles of sparking water and 10 bags of jellybeans?

b. Which situation does Najib prefer: sparkling water at $2 a bottle and jellybeans at $4 a bag or sparkling water at $2.50 a bottle and jellybeans at $3.75 a bag?

Najib has made his best affordable choice of sparkling water and jellybeans. He spends all of his income on five bottles of sparkling water at $2 each and 10 bags of jellybeans at $4 each. Now the price of sparkling water rises to $2.50 a bottle and the price of jellybeans drops to $3.75 a bag.