Answer:
Billy's mom increases his weekly allowance by $ 55 . As a result, Billy increases the number of apps he downloads on his smartphone.
If with increase in income demand increases, the good will be a normal good. Thus, apps that billy downloads are normal goods.
Susan gets a 15 percent performance bonus at work. She can finally stop eating so many frozen pizzas and eat something more tasty. Frozen pizzas are: Inferior goods
Here with increase in income, the demand for a commodity falls, the so called commodity is a inferior good. Thus, in this case frozen pizzas are inferior goods.
Mike is an appliance salesman. Refrigerator sales in his store have fallen and so has his commission. Mike decides to switch from name brand cereal to generic cereal. Generic cereal is: Inferior goods
If there is a fall in income and thus demand increases, the good is inferior. Thus, in this case generic cereal is an inferior good.
Hair stylist Molly loses a few of her clients. Molly cuts back on the number of smoothies she buys during the week. Smoothies are: Normal goods
If there is a decrease in income and thus demand falls, the good is normal. Thus, smoothies as commodity in this case will be refereed to as normal goods.