The first four terms of a sequence are given. Can these terms be the terms of an arithmetic sequence? 16, 9, 2, 6, . .. 0 Yes, the sequence is arithmetic. O No, the sequence is not arithmetic. If the sequence is arithmetic, find the common difference d. (If the sequence is not arithmetic, enter DNE.) d= Find the first five terms of the sequence. || 0" + an m ._. l| 0|: :1: N Ii 11: 4s H mm 11: U1 l| Determine whether the sequence is arithmetic. If it is arithmetic, find the common difference d. (If the sequence is not arithmetic, enter DNE.) d= Express the nth term of the sequence in the standard form an = a + (n 1)d. (If the sequence is not arithmetic, enter DNE.) A partial sum of an arithmetic sequence is given. Find the sum. 83+80+77+...+26