The daily newspaper America at a Glance has just released the results of a study of 50 students who completed preparation programs for a nationwide, standardized test. The following histogram, which summarizes the mathematics test score information for the students, was colorfully displayed on the front page of America at a Glance:

Based on this histogram, draw the ogive (the cumulative frequency polygon) for the test score data.

Frequency 20 16 15 12 12 10+ 5 5 5+ 550 600 650 Mathematics test score 700 750 800