in pride and prejudice mr. darcy is said to make 10,000 pounds a year, while his friend, mr. bingley, makes 5,000 pounds a year. how much more money did elizabeth make compared to her sister, jane, over the course of 40 years, by marrying mr. darcy instead of mr. bingley? assume both make a return of 5.0%, which is in-line with interest rates in 1813, and they invest everything they receive at this rate.