Find the new resistance (detail)?

A string of 25 identical Christmas tree lights are connected in series to 120V source. The string dissipates 69W. Then, one light bulb burns out. THe lamp has a wire shorts out the bulb filament when it burns out, dropping the resistance of the bulb to zero. What is the new resistance of the light string now (after 1 bulbs burns out)? Find the power dissipated by the string now (after 1 bulb burns out)