Plz can you help me​

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)