Your movie theater charges a single price of ​$ 4 4. The marginal cost of each patron is​ $1. A recent marketing survey revealed the following information about senior citizens and nonseniors. Price Number of Patrons Slope of Demand Curve Seniors ​$ 4 4 120 120 minus −​$0.01 per patron Nonseniors ​$ 4 4 100 100 minus −​$0.10 per patron a. The marginal revenue for senior citizens is ​$ nothing ​(enter your response as an ​integer)​, while the marginal revenue for nonseniors is ​$ nothing ​(enter