QUESTION 3 A wave traveling along a string is described by y(x,t)=0.00327*Sin (72.1x-2.72t) in which the numerical constants are in SI units (0.00327 m, 72.1 rad/m, and 2.72 rad/s). What is the type of the medium? lossless lossy other QUESTION 4 A wave traveling along a string is described by y(x,t)=0.00327*Sin(72.1x-2.72t) in which the numerical constants are in SI units (0.00327 m, 72.1 rad/m, and 2.72 rad/s). What is the initial phase in rad?