The table below shows the total cost schedule for Tania's Teapots. Use it to answer following questions: Output (teapots per day) 0 4 9 13 16 18 Total Cost (dollars per day) 20 45 70 95 120 145 1. What is Tania's total fixed cost? 2. What is total variable cost of 13 teapots? 3. What is the average variable cost of 13 teapots? 4. What is the average fixed cost of 13 teapots? 5. What is the marginal cost of 16th teapot