Hey, my questions is: Assume the probbilty that yoiu will make a sale on any given phone call is 0.12. find the probability that you (a) will mkae sale on fifth call, (b) make sale on first, second, or third call, and (c) do not make a sale on first three calls.

(a) P(first sale is made on fifth call)=

(b) P(on first,second. or third call)=

(c) P(sale not made in first three calls)=

Can someone please assist?

thank you