(a) A certain computer takes 2 seconds to compute a certain definite integral accurate to 4 digits to the right of the decimal point, using the left rectangle rule. How long will it take to get
8 digits correct using the left rectangle rule?
12 digits?
20 digits?
(Note: for each, include units)

(b) Repeat part (a) but this time assume that the trapezoidal rule is being used throughout.
To get 8 digits correct will take
12 digits,
20 digits,
(again, for each, include units)