Consider the data with analysis shown in the following computer output:

Level	N	Mean	StDev
A	4	10.300	2.872
B	5	16.800	2.168
C	6	10.800	2.387

Source	DF	SS	MS	F	P
Groups	2	128.75	64.38	10.73	0.002
Error	12	72.03	6.00
Total	14	200.78

What is the pooled standard deviation? What degrees of freedom are used in doing inferences for these means and differences in means? Round your answer for the pooled standard deviation to two decimal places. The pooled standard deviation= degrees of freedom =