If the five-year-old's mental age is also five, and the 60-year-old's mental age is 60, then they both have an IQ of 100: 5/5 x 100 = 100 (average IQ - on age level).
Booth was shot dead in a firefight with Union cavalry troops in a barn in the Virginia countryside on 26th April 1865, after having been on the run for 10 days.
Shortly after 10 p.m. on April 14, 1865, actor John Wilkes Booth entered the presidential box at Ford's Theatre in Washington D.C., and fatally shot President Abraham Lincoln.