The Number of Viewers of a Television Series Introduced Several

The number of viewers of a television series introduced several years ago is approximated by the function , where N(t) (measured in millions) denotes the number of weekly viewers of the series in the t ^th week. Find the rate of increase of the weekly audience at the end of week 12. ​

A) 13.439 million/wk
B) 3.360 million/wk
C) 0.529 million/wk
D) 0.132 million/wk
E) 25.398 million/wk