Please make sure your answer is 100% correct! I will give a positive review, thank you very much! Please make sure the answer is correct!

Consider three patterns of preference {i} An indifference curve drawn for two commodities is downwardsloping. (ii) An indiHerence curve drawn for two commodities is upwardsloping. [iii] An indifference curve drawn for two commodities is a vertical line. Brieyr describe the characteristics of' the commodities in the three patterns respectively