The following figure shows the recent of the U.S. population that was foreign-born for selected years from 1900 through 2005.

(a) Use the figure to find out the average rate of change in the percent of the U.S. population that was foreign-born from 1960 to 2005. Interpret your result.

(b) From the figure, determine for which two consecutive data points the average rate of change in the percent of foreign-born was

(i) Closest to zero

(ii) Furthest from zero.