Please answer question 8question and explain the solution

8. One wave on a string is given by 3110:, t) = 0.04- sin(2 1: x n t), where all positions are in meters and times are in seconds. The string is then replaced by a new string whose mass density is a factor of 4 larger ([12 = 4 111). Which of the following equations could describe a wave 312 (x, t) with the same frequency in this new string? A. y2(x, t) = 0.04- sin(21rx 21\") C. y2(x, t) = 0.16 sin(2 7: x 7: t) D. y2(x, t) = 0.1 sin(4 nx 7: t) E. None of the above