A student is studying for the IE 327 exam. A small lamp (10 candelas or 25 lumens) is located about 24 inches above a textbook and the student's eyes are about 20 inches from the textbook. The textbook page has a reflectance of 80%. The 10 pt typeface is 3/16 inches high. What is the visual angle for reading the text? Is this possible for the student, assuming normal (20/20) vision? Is there sufficient lighting? What is the minimum amount of light needed for this task?