Use the image to answer the question.
A histogram shows the age ranges per numbers of people. The horizontal axis shows ages of people ranging from 0 to 10 and then 10 to 90 in increments of 20. The vertical axis ranges from 0 to 5 in increments of 1. The graph shows the following data: 3 people are ages 10 to 30; 4 people are ages 30 to 50; 4 people are ages 50 to 70; 5 people are ages 70 to 90.
This histogram shows the ages of people living on Trey’s block. How many people on Trey’s block are less than 70 years old?