Consider a positively curved universe containing only matter (the ``Big Crunch'' model discussed in Section 5.4.1). At some time t0>tcrunch/2, during the contraction phase of this universe, an astronomer named Elbbuh Niwde discovers that nearby galaxies have blueshifts (−1≤z<0) proportional to their distance. He then measures H0 and Ω0, finding H0<0 and Ω0>1. Given H0 and Ω0, how long a time will elapse between Dr. Niwde's observations at t=t0 and the final Big Crunch at t=tcrunch? What is the highest amplitude blueshift that Dr. Niwde is able to observe? What is the lookback time to an object with this blueshift?