Computer Science Consider a LoRaWAN node that uses SF9/125 KHz. Assuming a code rate of 4/5, answer the following questions: A. Compute the symbol duration used by the node. B. Compute the data rate...

Consider a LoRaWAN node that uses SF9/125 KHz. Assuming a code rate of 4/5, answer the following questions: A. Compute the symbol duration used by the node. B. Compute the data rate used by the node. C. If the payload sent by each message is 200 B, how many messages per day can the node send if a duty cycle of 1% is enforced. D. Suggest a way to double the number of messages that can be sent per day by one node without changing the message size.