2. The integral ex1,)ressi0n f1] bx." dz and the summation expression 7 - .k:_ 1 are equivalent. in every way except that... O the limit should be changed to limmgtu. O the upper and lower bounds on the surrunat-ion shmild be changed from k : l and 'i' to k : l and n. respectively. O some change needs to be 1'1'1alde not mentioned above. (5) Both a. and I: should be implement-ed. O No change should be implemented; the two expressions are equivalent. 3. Which of the following integrals represents the area. (If a rectangle that is 7' units wide and 10 units tall? O f.\" 101: (is; 0 ED 71: da: f.\" 10:173.! O f\"? 10:: {213; C) ff 10 (1:1