A puppy's birth weight was 5 ounces, at 9 weeks the puppy weighed 59 ounces. On average, how many ounces per week did the puppy gain?

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)?