TIMED pls help. answer don’t explain.

Can someone me and plz do the problem

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?

Find the measure of angle b in the following triangle