The Suess group at MIT is exploring a redox active protein with four iron atoms and four sulfur atoms in a cubane structure. One of the irons is redox active and changes between iron III and iron II. By name or number, identify all of the statements which are true about this complex. 1) Increasing the number of hydrogen bonds to the sulfur atoms will increase the standard reduction potential of the cluster 2) All of the iron centers are high spin 3) Each iron is formally bonded to four sulfur atoms