can you please help me with these questions

Bert and Roger are the only two consumers in a particular market for coffee. The following table displays the relationship between the income of each consumer and quantity of coffee demanded per day when the price of coffee is $3.00 per cup. $1000 $2000 $3000 a) Suppose that Roger has income of $2000 and Bert has income of $3000. The quantity demanded of coffee per day by the market is [53'9\"] . b) Suppose that both Roger and Bert have their incomes increase to $4000. There is [Select] in the demand for coffee. 4} c) For Roger, coffee is a/an [SEIE'CT] J [ Select ] normal good inferior good d) For Bert, coffee is a/