need help with following

Computer chips coming off an assembly line are tested for quality and are rated defective (d) or good (g). A quality control inspection, carried out every hour, tests the chips until two consecutive chips are defective or until four chips have been tested, whichever occurs first. What is the event E that four chips will be inspected? OE = (gdgd, dggd, dgdg, ggdd, gggd, gggg) OE = (dd, gdd, ggdd, gggd, gggg) OE = (dd, gdd, gdgd, dggd, dgdg, ggdd, gggd, gggg) OE = (dd, gdgd, dggd, dgdg, ggdd, gggd, gggg)Five users are reading the same webpage for hotel reservations. The probability that any user will click the "BUY" link is 0.85. What is the probability that more than half will buy? O 0.0012 0 0.0266 Q 0.9988 O 0.9934