2. (2.5 points) Let Ln denote the left-endpoint sum using :1 sub-intervals and let Ru denote the corresponding right- endpoint sum. Given the continuous function f (t) = 2x2; :1) Compute L; for the given on the interval [1, 3] (Round your answers to four decimal places): 2a] b) Compute R4 for the given on the interval [1, 3] (Round your answers to four decimal places): 15 . . /_ [U . . . ,/ \"5 I.\" 13 :0 CF in 2h) 1:) Determine the exact are between the function f (I) = 2x2 and the x-axis on the interval [1, 3] using integration (Round your answers to four decimal places): 2c)