The following table shows the age at inauguration of each U.S. president.

(a) Make a stem-and-leaf display with a double stem.

(b) Find the median, Q1 and Q3.

Age at Name Inauguration 1. Washington 57 2. J. Adams 61 3. Jefferson 57 4. Madison 57 5. Monroe 58 6. J. Q. Adams 57 7. Jackson 61 8. Van Buren 54 9. W. H. Harrison 68 10. Tyler 51 11. Polk 49 12. Taylor 64 13. Fillmore 50 14. Pierce 48 15. Buchanan 65 16. Lincoln 52 17. A. Johnson 56 18. Grant 46 19. Hayes 54 20. Garfield 49 21. Arthur 50 22. Cleveland 47 23. B. Harrison 55 24. Cleveland 55 25. McKinley 54 26. T. Roosevelt 42 27. Taft 51 28. Wilson 56 29. Harding 55 30. Coolidge 51 31. Hoover 54 32. F. D. Roosevelt 51 33. Truman 60 34. Eisenhower 62 35. Kennedy 43 36. L. Johnson 55 37. Nixon 56 38. Ford 61 39. Carter 52 40. Reagan 69 41. G. Bush 64 42. Clinton 46 43. G.W. Bush 54 44. Obama 47