need urgently

Heat must be removed from a system according to how fast it is generated. Suppose the system has eight components each of which isinactive with probability 11.25, independently of the others The design of the heat removal system requires finding the probabilities of the following events: [it] None of the systems is active. [b] Exactly one is active. [c] More than four are active. [d1 More than two and fewer than six are active