A fast-food restaurant has determined that a customer will order a soft drink 90 percent of the time, a burger 70% of the time, and French fries 50% of the time. Assume, for this analysis, that orders for items are independent (for example, ordering a burger does not reduce or increase a customer's chances of ordering another item). a) What is the chance that the next customer will order a burger but not French Fries? [3 marks] b) What is the chance that exactly three of the next five customers will order a soft drink? [2 marks]