b) The 160 MHz 31P NMR spectrum of [Pd(PPh3)2(CI)(H)] is provided below. Ph3P P.Ph Pd: H ppm 22.5 22.0 21.5 11.0 10.5 10.0 9.5 9.0 i) State the spin system that describes the two 31P NMR signals. ii) Calculate all coupling constants in the two 31P NMR signals (in Hz). iii) Assign each signal to either Pa or Pb. Give a brief explanation for your answer. [1] [4] [5]