In mysql, iwth innodb, how are primary and secondary indexez created?

Three out of five seniors remain undecided about a college major at the end of their senior year.

Jackson, who works in the finance department of a company, is holding a seminar for other employees on how to file taxes. only three employees sign up to attend the seminar. which device can he use to share his presentation with a group of three employees?

How can the temperature of a room be raised by 5degreesf?