What is the value of expression math

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

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170