PLZ HELP!!>\\< [Maximum mark: 6]
The equation of a line L, is 3.x = 12 - y.
(a) For the line L1, find:
(i) the r-intercept;
(ii) the gradient.
A second line, L2, intersects the r-axis at P(2.0) and is parallel to L.
(b) Find the equation of L2, giving your answer in the form y=mr +c.
(c) Calculate the y-intercept of L2.

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