Anyone who answers correctly gets brainlist!

Hi, can anyone show me how to do this problem? 100 points for this. in advance

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)?

What does y equal in y divided by -1 = -2?