1 ) . The speed of a runner increased steadily during the first 3 seconds of a race. Her speed at half -second intervals is given in the table . Find lower and upper estimates for the distance ( in f+ ) that she traveled during these & seconds + ( 3 ) 0 0.5 1 . 0 20 2.5 /3.0 v ( f + /s ) | 0 /5 . 7 /1 . 2 / 17 .5 /19 .4 20 . 2 2 ) Evaluate the Riemann sum for f ( x ) = 1 + + x 2 4 x 4 14 = LU If f ( x ) = 4 x2 - 7x, OL x