During Its Grand Opening Week, Stickler's Bicycle Shop Offers a "Wheel

During its grand opening week, Stickler's bicycle shop offers a "wheel of discount
savings." After customers select the items they wish to purchase, they spin the wheel to
determine the discount they will receive.The wheel is divided into 12 slices.Six slices
are red and award a 10% discount, three slices are white and award a 20% discount, and
two slices are blue and award a 40% discount.The remaining slice is gold and awards a
100% discount! a.What is the probability that a customer gets at least a 40% discount?
b.What is the probability that a customer does not get at least a 40% discount?
c.What is the probability that a customer gets a 10% or 20% discount?
d.What is the probability that two customers in a row get a 20% discount?