9. An electronic device has a life length of X, which is a continuous random variable with PDF f(x)=ex Suppose that the cost of manufacturing such an item is £2. If the manufacturer sells the device for £5 but offers a full refund if the lifetime X<0.5 then rounded to TWO decimal places the expected profit per item for the manufacturer is £ If the manufacturer sells the device for £6 but offers a full refund if the lifetime X<0.6 then rounded to TWO decimal places the expected profit per item for the manufacturer is £

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