All About Articles: When to use A, An and The

What should fill the gap in this sentence? '___ artificial intelligence is changing the way we access data.'

'I need to buy ___ new laptop for my coding class.'

'___ internet has revolutionized global communication.'

'He is ___ engineer who works in program design.'

'I have ___ MacBook and ___ iPad in my backpack.'

'___ information found on that website is very reliable.'

'It takes ___ hour to complete the system backup.'

'Valuable metals are  ___  critical resource for ___ tech industry.'

'We are looking for ___ USB cable to connect the printer.'

'___ laptops are more portable than ___ desktop computers.'