Sarah gets arise in payoff 20% before her raise, she purchased 5 kilogram of hamburger and one kilogram of steak a month after her ways she consumes 3 kilograms of steek and two kilograms of hamburger month if no other element influences changed we know that

both steak and hamburger are inferior goods for Sarah

both steak and hamburger are normal goods for Sarah

hamburger is an inferior good and steak isn't normal good for Sarah

hamburger is a normal good and stick is an inferior good for