By taking readings from the curves shown in Figs 39.6 and 39.7, give approximate answers to the following questions for the 1960s and for the 2010s. For each question, say whether you’re using the PDF or the CDF, and explain how you’re using it to get the answer.

a. For someone who died in that decade, what was the probability they were less than 60?

b. What was the probability they were over 80?

c. What was the most common age of death?

d. Roughly how common was infant death (age 0), compared with the most common age of death?