The probability of passing the biology course (event A) is 0.80, and independently, the probability of passing the math course (event B) is 0.70.a) What is the probability of passing both of these courses?

A student is going to write the final exam tests in biology and math next week. The probability of passing the biology course (event A) is 0.80, and independently, the probability of passing the math course (event B) is 0.70.a) What is the probability of passing both of these courses?b) What is the probability of passing at least one of these courses?c) What is the probability of passing exactly one course: biology or math?d) What is the probability of failing both courses?