Hello I am weak at maths! today was my math exam and I didn't do it well. Please help me daily when I ask questions in an easy manner so that I can understand well. Accept my humble request

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?