The museum charges $40 for the group of 10 or fewer people. The group of more than 10 people should, in addition to $40, pay $2 per person for number of people above 10. For instance, group of 12 pays $44 and group of 15 pays $50. Maximum group size is 50. Draw the graph which represents the situation. Determine domain and range of cost function? Write the equation of cost function.