Show that the leap-Frog scheme (central-time-central-space) is second-order accurate in both time and space. Show further, by von Neumann stability analysis, that this scheme is unconditionally...

Show that the leap-Frog scheme (central-time-central-space)

is second-order accurate in both time and space. Show further, by von Neumann stability analysis, that this scheme is unconditionally unstable; in other words the scheme is practically useless.