Which of the given probably comes closest to make a free good: (1) Unexpected warmth through the sun within Chicago in January. (2) A hot school lunch given for a needy student. (3) A microwave pizza bought along with food stamps. (4) Income earned through picking up aluminum cans within your spare time. (5) A home entertainment system you won for being SouthWest Airlines’ ten millionth passengers.
Can someone explain/help me with best solution about problem of economic...