$7.$ a$)$ Outline the key differences between Bluetooth and Zigbee in terms of network architecture and

typical use cases in the context of WPANs. $(3$M$,$ BTL$-2,$ CO$2)$

b$)$ Analyze the protocols employed by Bluetooth and Zigbee in terms of scalability, security, and

interoperability. Evaluate the implications of these factors on future WPAN applications and

propose a new hybrid protocol that combines the strengths of both technologies, detailing its

potential benefits and challenges in implementation