A telephone saleswoman arranges a sequence of interviews of potential customers in order to sell them an insurance policy. She believes that her success rate in completing a sale in any interview is 11 %. Provide answers to at least 3 decimal places.

Determine the probability that she fails to make a sale on the first five interviews:

Determine the probability that she makes her first sale on the fourth interview:

Determine the probability that the second sale is made on the sixth interview: