question 6 and 7 calculate them please

6. How does Heather's optimal choice change when the price of compost decreases from $4/kg to $2.50/kg? 7. How does Heather's optimal choice change when the price of tomatoes increases from $.50/kg to $1/kg? In Heather's situation, the MC is constant because she pays the same price for each kilogram of compost. This is the typical pricing scheme (ie fixed price per unit). Another type is a flat fee pricing where the buyer pays a set amount and can use any amount of the product without any additional payments. This type of pricing is used by some municipalities for utility services (eg water, sewer, and solid waste), all-you-can-eat buffets, and some attractions (eg amusement parks). Under flat fee pricing, additional units of the product after the first are obtained at MC