You are considering two cell phone providers. WirelessIowa charges $120 per month for the service regardless of the number of phone calls made.

You are considering two cell phone providers. WirelessIowa charges $120 per month for the service regardless of the number of phone calls made. Rent-A-Cell charges $1 per minute for calls, without any minimums. Your demand for minutes of calling is given by the equation:Q_d = 150-50*P, where P is the price of a minute.a) With each provider, what is the cost of an extra minute on the phone?