All answers are correct, Well done 
A7. Cricinfo - Records - Test matches - Most wickets taken bowled
A8. Cricinfo - Records - One-Day Internationals - Carrying bat through a completed innings
A9. Cricinfo - Records - Test matches - Youngest player to score a double hundred
btw the youngest player to score a test hundred is Mohammad Asharful (114) of Bangladesh (aged 17y 61d v SLA in Colombo 2001)
&
the youngest player to score a test triple hundred is Sir Garfield Sobers (365*) aged 21y 213d v Pakistan @ Kingston, 1958