Table 8: Comparison of at different times for , with , and , problem (b).

Present 0.001 0.002 0.002 0.003 0.003 1/2 [9] 0.004 0.006 0.007 0.017 0.045 1/2 Present 0.044 0.049 0.050 0.051 0.051 1/8 [9] 0.346 0.339 0.340 0.347 0.356 1/8 Present 0.937 0.939 0.939 0.939 0.939 1/24 [9] 4.340 4.336 4.363 4.402 4.432 1/24