Misc: What manufacturer of pens & throw away razors also make sailboards?

Questions

Who was the female Prime Minister of England throughout the eighties?

What TV show with married couples and family life appealed to those over the age of 29?

What rock magazine that came out in the eighties is now Rolling Stone's major competitor?

Which movie prompted the style of wearing cutoff sweatshirts over the shoulder?

In which Fox TV show did Johnny Dep play an undercover cop in high school?