The spinner on a wheel of fortune can land with an equal chance on any one of ten regions. Three regions are red, four
are blue, two are yellow, and one is green. A player wins $4 if the spinner stops on red and $2 if it stops on green. The
player loses $1 if it stops on blue and $5 if it stops on yellow.

a. What is the expected value?
$ (Round to the nearest cent.)