Under which president did George M. Dallas serve as Vice President?

Which president served from 1845 to 1849? In what year did James K. Polk first take office as President? In which state was James K. Polk born? Who served as Vice President under James K. Polk? Who was First Lady during James K. Polk's presidency? Sarah Polk was married to which president? Which number president was Zachary Taylor? Who succeeded Zachary Taylor as President of the United States?