The test in a CSTR reactor where an A->R reaction occurs with K=0.311 min^-1 gives us the following tracer test data.

t	c(t)
0	0
5	50
10	32
15	25
20	20
30	16
40	10
50	5
60	0

Calculate the moments of residence and x(t) by the segregation method, also calculates the moments of residence tm, and ^2.