Consider the following probability distribution.

xi	P(X = xi)
0	0.30
1	0.30
2	0.10
3	0.30

The expected value and standard deviation are _____ and ________, respectively.

a. .4000; 2.1580

b. 1.0000; 1.2270

c. 1.4000; 1.2000

d. 2.0000; 1.8380