Need help with these economic questions, thanks!

The equilibrium price is best defined as the price at which: O suppliers want to supply more goods. O the quantity demanded increases. O demand is smaller than supply. O quantity demanded is equal to quantity supplied. O demanders want to buy more goods.At a price of $5, Sam buys 10 units of a product; when the price increases to $6, Sam buys 8 units. Martha says Sam's demand has decreased. Is Martha correct? O No, Martha is incorrect. Sam's quantity demanded has increased, and his demand has increased. O No, Martha is incorrect. Sam's quantity demanded has decreased, and his demand has not changed. O Yes, Martha is correct. Sam's demand has decreased. O No, Martha is incorrect. Sam's demand has increased, and his quantity demanded has decreased. O No, Martha is incorrect. Sam's demand has increased