Which of the following statements is not true about initramfs?

The systemd unit from the initramfs image executes all units for the initrd. target target.

On Red Hat Enterprise Linux $9,$ the initramfs does not contain an entire usable system by itself.

The kernel executes the $/$sbin$/$init script from the initramfs image as PID $1$

The kernel initializes all hardware for which it can find a driver in the initramfs.