In the market for used cars we have 10 sellers, willing to sell at the prices of $1000, $2000, $3000, $4000, $5000, $6000, $7000, $8000, $9000, $10000. If the equilibrium price in the market is $2500, how many cars would be sold? a. ​2 b. ​4 c. ​1 d. ​3