please send solution

3. (8 points) An insurance company offers a discount to homeowners who install smoke detectors in their homes. A company representative claims that 70% or more of policyholders have smoke detectors. You draw a random sample of eight policyholders. Let X be the number of policyholders in the sample who have smoke detectors. a). If exactly 70% of the policyholders have smoke detectors (so the representative's claim is true1 but just ltzoarely)1 what is P(X 2 4)