Answer:
Zebra.
Explanation:
Stack is LIFO, so Zebra is added in the last so it will be removed first.
XT(extra technology) computer: it cannot support GUI Based operating system. its processing speed is 477MHz
AT(advanced technology):it supports GUI Operating system. Its processing speed is 2GHz
PS/2:is a laptop computer which is rechargeable
and battery powered. it's operated with OS/2 operating system.
PLEASE MARK AS BRAINLIEST
Answer: what
explanation: what??