can somebody me. its scatterplots and linear graph

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Answer for 10 points show work you guys in advanced < 3

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?