In a certain city, 40% of all households get internet service from the local cable company, 80% get television service from the same company, and 30% get both services from that company.

(a) What is the probability that a household gets at least one service from this company?

(b) What is the probability that one of these households does not use this company for either of these two services?

(c) If it is known the a household uses this company for its internet service, what is the probability that also uses this company for its television service?