Please help me to answer these questions! Thank you

Helen is a digital designer who creates commissioned artwork using advanced graphic software. It costs Helen $30 to create the first design in an artwork series and $10 for each subsequent design. Helen can sell 4 designs in a series for $250 and 5 designs in the same series for $300. Which of the following statements is true: (a) The average cost for 10 designs is $10 per design. (b) The marginal cost of the fifth design is $10. (c) Helen should produce the fifth design because the marginal revenue is greater than the marginal cost. C (d) The marginal benefit of the fifth design is $60. (e) The producer surplus of the fifth design is $60. QUESTION 2 The following table describes the production possibilities frontier for rice and software production in Vietnam. Rice (kilograms) Software (thousand lines of high-quality computer code) 1000 0 850 400 650 760 430 100 175 1200 1700 What is the best statement about the opportunity cost of producing an additional 25 kilograms of rice in Vietnam? (a) The opportunity cost of an additional 25 kilograms of rice is 30 thousand lines of code. (b) The opportunity cost of an additional 25 kilograms of rice changes depending on how many lines of software code are produced. (c) The opportunity cost of producing an additional kilogram of rice cannot be determined from the data in the table. (d) The opportunity cost of an additional kilogram of rice increases as more software code is produced. C (e) Statements (a) and (b) are both correct.Market demand is described by Q = 20 - P2, where I] is the quantity demanded and P is the price in dollars. What is the consumer surplus if the market price is $12? "T ta} :42 C\" in $34 (7 {4:} $1133 r'j' @3195 if {e} $2313 Consider a perfect competition firm with the following cost and market structure: Price ($/unit) MC 10 0 10 20 30 40 50 60 70 80 90 100 Quantity (units) Ceteris paribus, when demand is Py, the best strategy this firm should adopt is to: (a) exit the market. O (b) shut down in the short run. (c) continue to operate as it is making a profit. (d) continue to operate as its loss is not greater than its variable cost. (e) continue to operate in the short run and exit the market in the long run