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a) Given a battery with 1.5 V and 2200 mAh. How long can it power a...

a) Given a battery with 1.5 V and 2200 mAh. How long can it power a device that has a demand of 1.1 W?
b) Given a sensor node that consumes 600 μA when the radio is not transmitting and 25 mA when the radio is transmitting. It is powered using two batteries in series, each with 3 V and 2200 mAh.
i) How long do the batteries last, if the device is transmitting with a duty cycle of 20%?
ii) How long do the batteries last, if the device is transmitting with a duty cycle of 20% but the battery leaks 20 mJ of its energy every hour?
iii) Suppose the transmission rate of the node is 1.25 Mbps, what is the energy required for transmitting one byte of data?

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