Hi, I`m having issues figuring out how to calculate the expected counts.

Iliad Weapons: The Iliad also reports the cause of many injuries.Here is a table summarizing those reports for the 152 injuries for which the Iliad provides that information.Is there an association?

a)Under the null hypothesis, what are the expected values?

Injury Site Body Head/Neck Limb Total Weapon Arrow 12 Ground/Rock 11 Sword 61 UI N 38 23 122 Total 67 45 33 145