At t=0, the center of an upright rectangular pulse 0.50m long on a light string is 0.10m to the left of a knot that joins it to a heavier string. The wave speed is 4.0m/s in the light string and 2.0m/s in the heavier string. For the instant t=0.25s after the pulse center reaches the knot, state for BOTH the reflected and transmitted pulses:
• the distance of the pulse center from the knot,
• whether the pulse is upright or inverted, and
• the length of the pulse.