k

2

2.5

3

4.22

5.58

6

G_t

0.8862269

0.8872639

0.8929796

0.9091863

0.9239619

0.9277197

G_e

0.8736304

0.9007007

0.9032822

0.9106438

0.9337902

0.9414530

Relative error (%)

1.4

1.5

1.1

0.16

1.06

1.5