me i need click

*just set up the equation for me.
two runners run the same course. the first runner takes twice as long to run the course and the second runner. if the first runner runs 6 mph and the second runner runs 9 mph, how long does it take each of them to run the race

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?