Consider an isolated composite system consisting of subsystems a and b that can exchange energy with each other subsystem a consists of three noninteracting spins, cach having magnetic moment ! subsystem b consists of two noninteracting spins cach with a magnetic moment 2 a uniform magnetic field h is applied to the composite system (a) suppose that the total energy is e = -3uh what are the accessible - crostates of the composite system? (b) what is the probability p(m) that system a has magnetization m? (5) (c) suppose that systems a and b are initially separated from each other and that the net magnetic moment of a is -34 and the net magnetic moment of b is +4u the systems are then placed in thermal contact with one another and are allowed to exchange energy what is the probability p(m) that the net magnetic moment of systemi a has one of its possible values m? (d) for the situation described in (c), what is the mean value of the net magnetic monent of system a?