4.4. _ . coal} com c0527: 05311" 3. Writethe series + ++ + - - . using sigma notation starting at k = 0 21 22 23 2' I). Write the series in partla} as an alternating series in the form Ell-131%,: and identify the positive part of the general term. t-0 c. Find a sum estimate for \"'9 '5'\" 99'3\" \"'5\" to 3 decimal places ?'+?'+ 23 \"57*\" d. True or False; The question in part [cl could equally be phrased: Find a sum estimate for CCISU 0251'! 60921! COST! 21 +2+2+ 2' +n- toanaccuracyofnoos e. Reindex the series you wrote in part {b} so that the index is n with the counting starts at n = 1