Please answer using excel

A store gathers some demographic information from their customers. The following chart summarizes the age-related information they collected: One customer is chosen at random for a prize giveaway. What is the probability that the customer is at least 20 but no older than 40 ? What is the probability that the customer is either older than 50 or younger than 20 ? What is the probability that the customer is at least 60 ? Enter your answers as either decimals or fractions, not as percents