PLEASE USE UP AND DOWN ARROWS AND EXPLAIN IN LAYMAN'S TERMS.

PLEASE ANSWER ALL AND NOT JUST SOME

9 . Efficiency in the presence of externalities Roses confer many external benefits on society: the beauty they add to a room or garden, the wonderful aroma they give off, and so on. Therefore, the market equilibrium quantity of roses is not equal to the socially optimal quantity. The following graph shows the demand for roses (their private value), the supply of roses (the private cost of producing them), and the social value of roses, including both the private value and external benefits. Use the black point (plus symbol) to indicate the market equilibrium quantity. Next, use the purple point (diamond symbol) to indicate the socially optimal quantity. Supply (Private Cost) Market Equilibrium Socially Optimal Level PRICE OF ROSES Social Value Demand (Private Value) QUANTITY OF ROSES