And show workout so i can know how to understand it (and both questions)

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

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Question 4 of 10 2 points what is the second part of the process of investigating a question using data? a. rephrasing the question o b. describing the data c. collecting the data o d. making an inference submit