A girl, 5 feet tall, notices that when she is 2 feet from her boyfriend the line of sight to the top of a building just passes over the top of his head. Her boyfriend is 6 feet tall and is standing 100 feet from the building. How tall is the building?

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?