A piano tuner hears three beats per second when a tuning fork and a note are sounded together

a piano tuner hears three beats per second when a tuning fork and a note are sounded together and six beats per second after the string is tightened. what should the tuner do next, tighten or loosen to tune the string? tighten the string and hear more beats per second. this means the tuner is moving toward tuning the string. nothing, because the string might already be in tune. loosen, and then tighten until the maximum number of beats is heard. loosen the string and hear fewer beats per second. this means the tuner is moving toward tuning the string