An industrial chemical that will retard the spread of fire in paint has been developed. The local sales representative has determined from past experience that 48% of the sales calls will result in an order.

(i) What is the probability that the first order will come on the fourth sales call of the day?

(ii) If eight sales calls are made in a day, what is the probability of receiving exactly six orders?

(iii)If four sales calls are made before lunch, what is the probability that one or less results in an order?