The magnitudes (but not the signs) of the standard reduction potentials of two metals X an...

The magnitudes (but not the signs) of the standard reduction potentials of two metals X and Y are

where the ∥ notation denotes that only the magnitude (but not the sign) of. the E° value is shown. When the half-cells of X and Y are connected, electrons flow from X to Y. When X is connected to a SHE. electrons flow from X to SHE. (a) Are the E° values of the half-reactions positive or negative? (b) What is the standard emf of a cell made up of X and Y?