Please help me with the following questions.

a)

Consider a market illustrated by the following supply and demand schedules. At a price of $15, there is a O shortage of 40 units. 0 shortage of 60 units. O surplus of 40 units. O surplus of 60 units. Consider the market for minivans. If the price of steel decreases, then which of the following statements regarding the market for minivans is correct? 0 Supply will increase 0 Supply will decrease 0 Demand will increase 0 Demand will decrease Consider the market for minivans. If the price of steel decreases, then the price of minivans will 0 increase 0 decrease Q be indeterminate