To​ begin, read the following problem statement. Suppose Call−Now offers an international calling plan that charges $10 per month plus $0.15 per minute for calls outside the United States. Requirements 1. Under this​ plan, what is your monthly international​ long-distance cost if you call Europe for a. 20 ​minutes? b. 40 ​minutes? c. 80 ​minutes? 2. Fill in the graph illustrating your total cost under this plan. Show your costs at 20​, 40​, and 80 minutes.