Interpreting joint probability

Your company tracks customer purchases and categorizes them into low, medium, and high spenders, as well as short, medium, and long visit durations. The following probabilities are observed:

Visit duration	Low Spender	Medium Spender	High Spender	All spenders
All durations	36%	46%	18%	100%
Short	13%	13%	6%	32%
Medium	14%	22%	8%	44%
Long	9%	11%	4%	24%

What is the joint probability that a randomly selected customer is a medium spender and has a long visit duration?