Exercise 9.7. Comparison operators (1) Say that signals a,b,c, and d are of type SIG. Determine the value of each expression below and inform whether the comparison returns true or false for a= "0111" (= 7), b= "1010" (=-6), (=b"0100_0000" (=64), and d=b"1111_1111" (=-1). Assume that overflow never occurs. a) -a "1111" c) (c/a)*a (c*a)/a f) minimum(a, b)