The anode is the negative electrode and so will be donating electrons to assist in this chemical reaction occuring. All reactions accept electrons as reactants. The key issue is the reduction potential Eo (+1.8V). This is greatest for the reaction:
Co3+ + e -> Co2+
Therefore this reaction has the greatest tendency to occur.
L×w×h=v
length times width times height equals volume
the order in which you multiply does not matter
Metalloids had properties that fall between those of metals and nonmetals (I believe that to be correct-.-)