Final answer:
To find Liam's age, subtract the sum of the ages of the other family members from the total combined age. Liam's age is 50 years.
Step-by-step explanation:
To find Liam's age, we need to first calculate the combined age of Mark's family members. The table shows that the combined age is 95 years.
We can find Liam's age by subtracting the sum of the ages of the other family members from the total combined age. In this case, subtracting 4+32+4+91+4 gives us 145. Therefore, Liam's age is 145 - 95 = 50 years.