Which of the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)

`shutdown -R 1 now` is an incorrect syntax; `-R` is not a standard option for `shutdown` to specify a run level, and `-r` (reboot) does not take a run level argument this way.

`shutdown -single now` is not a valid `shutdown` command option; `shutdown` does not have a `-single` option to enter single-user mode.

The `init 1` command directly instructs the `init` process to switch to run level 1, which is the single-user mode, providing a minimal environment safe for maintenance tasks.

`telinit 1` is a utility that sends a signal to the `init` process, instructing it to change the system's run level to 1, effectively entering single-user mode for maintenance.

The `runlevel` command displays the current and previous run levels; it is a query command and does not change the system's run level.