SOS! I am looking all over the chapter and nothing in the chapter breaks this down apart from

referencing a table

Age 71 = distributed period = 26.5

Mark, who is single, must start marking distributions from his pension plan beginning April 1, 2018. At the end of 2017 when Mark was 71 years old, the plan had a balance of $220,000. He will use a single life expectancy. What amount must Mark take as a distribution from the pension plan no later than April 1, 2018?

Does someone out there actually know how to solve this - is this questions solvable?

Pawel