Please look at the image and don’t send me links that I will have to download apps on it or viruses

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

Which choice represents the sample space ,s for this event

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists