\f2. The integral expression f7r (i) d 77/2 cos a: a: and the summation expression limAmm ELK/2 cos($ik)A:L'k; a = 7r/2, b : 71' are equivalent in every way except that... O the limit should be changed to limmw. O the upper and lower bounds on the summation should be changed from \" k = 7r/2 \" and \" 7r \" to \" k = l \" and \" n \" ,respectively. 0 some change needs to be made, not mentioned above. 0 Both a. and I) should be implemented. 0 Niether a. nor b should be implemented; the two expressions are equivalent. \f4. The integral expression I17 5397 dm and the summation expression 7 limmr>00 31 53:15:35 (1 : l, b : 7 are equivalent in every way except that... O the limit should be changed to limAwHO. O the upper and lower bounds on the summation should be changed from k = 1 and 7 to k = 1 and n, reSpectively. 0 some change needs to be made, not mentioned above. 0 Both a and 6 should be implemented. O No change should be implemented; the two expressions are equivalent