Please help on my hw

Let x = a + bi and y = c + di and z = f + gi. which statements are true?

5cakes cost 3.50 how much do 7 cakes cost

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)?