Table 7: Comparison of at different times for , with , and , problem (b).


Present 0.002 0.003 0.003 0.004 0.004 1/2
[9] 0.006 0.010 0.014 0.022 0.043 1/2
Present 0.032 0.036 0.038 0.038 0.038 1/8
[9] 0.228 0.227 0.227 0.227 0.226 1/8
Present 0.431 0.433 0.433 0.433 0.433 1/24
[9] 3.431 3.426 3.426 3.426 3.429 1/24