read serr 4
1 25.00    27.50 0.016388 0.051859
2 27.50    30.25 0.071319 0.051755
3 30.25    33.28 0.088866 0.051697
4 33.28    36.60 0.067751 0.051560
5 36.60    40.26 -0.017933 0.051457
6 40.26    44.29 0.063055 0.051480
7 44.29    48.72 0.049337 0.051674
8 48.72    53.59 -0.002110 0.051709
9 53.59    58.95 0.013268 0.051766
10 58.95    64.84 0.003024 0.051469
11 64.84    71.33 0.039501 0.051514
12 71.33    78.46 0.131900 0.051582
13 78.46    86.31 -0.013293 0.051952
14 86.31    94.94 -0.027517 0.051548
15 94.94   104.43 0.012583 0.051560
16 104.43   114.87 0.089112 0.051514
17 114.87   126.36 0.064999 0.051709
18 126.36   139.00 0.024258 0.051582
19 139.00   152.90 0.034712 0.051548
20 152.90   168.19 0.022776 0.051582
21 168.19   185.01 0.061174 0.051503