Usain Bolt's 9.58 in Berlin.
The 2004 Olympic gold medalist in the 100 meter dash was Justin Gatlin of the United States in a time of 9.85 seconds.
If he is trying to compete in High School track then he should be running below 12 sec.
I would say that it depends on the IHOP early bird special.
about 13-14 seconds
The fastest 800 dash by a male is: 1:41.01 by David Rudisha of Kenya The fastest 800 dash by a female is: 1:53.28 by Jarmila Kartochvilova of Czechoslovakia
I would say about 16 to 17 seconds
1952 Summer Games in Helsinki. Nigeria sent 9 male athletes to compete in 100 meter dash, 200 meter dash, 4x100 meter relay, high jump, and long jump. The best finish was a 9th place in high jump by Josiah Majekodunmi.