Question 3 (10 Points) [A] (6 points) Atypical 1.5 V battery has a capacity of 28 mAh. Assume that this battery is used to operate a ZigBee node. Answer the following questions: 1. How much (in watts) can the node consume if it operates continuously for 3 years? 2. If the node can turn off its transceiver, it will be able to reduce power consumption by 80%. If the node can use sleep modes to keep the transceiver on only 10% of the time, how much longer will the battery life become. 3. Given 0.5 mW RF transceiver for a ZigBee device. Assume this same power is used when transmitting and receiving. For the device's battery to last 3 years, what percentage of time the transceiver should be on? Ignore the power consumed by the rest of the nodes. [B] (4 points) Consider 14 piconets coexisting in certain area. Assume that the slaves are sending packets of sizes 1,000 bytes to the master. The master acknowledges any packet it receives. Answer the following questions: 1. Calculate the throughput in this setting? 2. Calculate the probability of data collisions in this setting. 10 4