What percentage of rows with missing 'stalk-root' values belong to the poisonous mushroom class (class 'p')?

What percentage of rows with missing 'stalk-root' values belong to the poisonous mushroom class (class 'p')?: a task in data-agent-harbor-train (Harbor dataset). Files (in /home/user/input, no subfolders): - (see /home/user/input)