Top $5$ technology topics every Executive should know about.

$1.$ Cybersecurity

$2.$ Artificial Intelligence $($AI$)$

$3.$ Internet of Things $($IoT$)$

$4.5$G

$5.$ Digital leadership

a$)$ Support your answer with facts and figures about the implication of each technology on business, the specific industry areas which the technology has and impact on$.$

b$)$ For your topmost selection out of these five technology topics, take a deeper dive, and add another section, specifically addressing the opportunities it can provide. Include sustainability as well as legal &$/$or ethical challenges.