6. An engine has a builtin redundant system consisting of n microchips connected in parallel fashion. such that the engine will work unless all microchips fail at the same time. The probability that a each microchip works is 0.59, and this is independent of Whether the other microchips work. Determine the minimum it needed to ensure a probability of at least 99% of proper operation of the engine. a. 6 b. 3 c. 30 d. 1 e.9