premise: During a recital, two pianists—Wayne and Zara—will perform solos. There will be five solos altogether, performed one immediately after another. Each solo will be either a modern piece or a traditional piece. The choice of pianist and type of piece for the solos must conform to the following conditions: The third solo is a traditional piece. Exactly two of the traditional pieces are performed consecutively. In the fourth solo, either Wayne performs a traditional piece or Zara performs a modern piece. The pianist who performs the second solo does not perform the fifth solo. No traditional piece is performed until Wayne performs at least one modem piece. If the fifth solo is a traditional piece, then for exactly determined?
hypothesis: two