K12 4.03 Heat Lab (PLEASE HELP) [30 POINTS] (REAL ANSWERS, please)

I can't find the enthalpy of fusion for one of my trials. Info I have: 3,160 heat absorbed and 55g of ice melted (410g for the calorimeter w/ nothing -- 452g in the calorimeter w/ water -- 500g in the calorimeter w/ ice and water -- then I poured out the water after stirring and got 445g for the remaining ice). Also, I'm not sure what it means when it says I need to find the percent error from the accepted enthalpy of fusion of water of 334 J/g?

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.

It can be classified based on its