Consider a string of total length LL$,$ made up of three segments of equal length. The mass per unit length of the first segment is $\backslash$mu $\backslash$mu $,$ that of the second is $2\backslash$mu $2\backslash$mu $,$ and that of the third$(\backslash$mu $)/(4)(\backslash$mu $)/(4.)$ The third segment is tied to a wall, and the string is stretched by a force of magnitude TsTs applied to the first segment; TsTs is much greater than the total weight of the string.