In figure (a), string 1 has a linear density of 2.60 g/m, and string 2 has a linear density of 4.60 g/m. They are under tension due to the hanging block of mass M=430 g.

(a) Calculate the wave speed on string 1.

(b) Calculate the wave speed on string 2.

The block is now divided into two blocks (with M₁ + M₂M) and the apparatus is rearranged as shown in figure (b). Find M₁ and M₂ such that the wave speeds in the two strings are equal.