2. (i)Which term of the A.P. 3,8,13,...is 248? (ii) Which term of the A.P. 84,80,76,... is 0? (iii) Which term of the A.P. 4,9,14,... is 254? (iv) Which term of the A.P. 21,42,63,84,...is 420? (v) Which term of the A.P. 121,117,113,... is its first negative term?