“…Recently, several new techniques have been presented to overcome the mentioned difficulties. Some of these techniques include Variational Iteration Method (VIM) [9][10], decomposition method [11], Homotopy Perturbation Method (HPM) [12] [13] and Homotopy Analysis Method [14,15,16,17,18,19,20,21,22] etc. The Homotopy Analysis method (HAM) has been introduced by Liao in 1992.…”