Identify and describe the specific social engineering technique demonstrated in each of the following scenarios:
An individual calls the service desk of a logistics company, pretending to be a senior database administrator from the head office who is locked out of the system during an emergency network outage. They convince the call handler to reveal a temporary password.
A person wearing a high-visibility jacket and carrying a heavy tray of coffees stands near the secure staff entrance of a bank. As an authorized employee swipes their ID badge to open the door, this person walks in closely behind them before the door locks, pretending they cannot reach their badge.
A marketing executive receives an email that appears to come from the company's payroll provider, warning that their bank details must be updated immediately via an enclosed link to avoid a delay in salary payment. The link directs them to a spoofed login page.