Assume that there are two continuous random variables X and Y where the values of each one of them is negative. It is known that the covariance of X and Y is -2. Also it is known that the expected values of X, Y, (YX) are the same. Determine the expected value of (1-Y)(1-X)
a) 0
b) 1
c) -2
d) -1
e) 2