2. (8 points) A professional 3D printer costs $3710. John wants to 3D print sets of 3 miniature figures to sell for $8 each. The materials and energy needed to produce one set of miniatures costs an average of $3. Let x be the number of sets sold. What is the (a) cost function, (b) revenue function, (c) profit function and (d) break-even quantity for x sets of miniatures