[hint: calculators can be used for this as if it were a weighted mean (see chapter 3):X goes in L1, and P(x) goes in L2.)] Consider the following discrete probability distribution:

X	-0.63	0.30	0.57	1.2
P(X)	0.1	0.4	0.3	0.2

a) What is the expected value of X?

Round your answer to at least3 decimal places.

b) What is the Variance of X?

Round your answer toat least 3 decimal places.

c) What is the Standard Deviation of X?

Round your answer toat least 3 decimal places.