5. Below are EPR spectra of a 6-coordinate (left) and 5-coordinate (right) heme model complexes, for your reference in answering the questions below: A research group syntheized a structural model complex for the ferrous heme site of a bacterial NO reductase enzyme. The EPR spectrum of this model complex is shown below. Answer the following questions about it: a. Is the EPR signal of the NO reductase model complex isotropic, axial, or rhombic? Explain your choice. b. Based on these data, and referencing the example structures of 5 - and 6- coordinate hemes at the beginning of this question, what is the coordination number for the NO reductase model complex? c. Although it may be difficult to see from these data, there is three-line hyperfine splitting present in the spectrum. What is the nuclear spin (I) for this species