4. Table 1 lists the parameters of the active-passive alloys A, B, C, and D. a. Calculate critical current densities of the active-passive alloys [4pts] b. Which of the alloys will be more corrosion resistant in the reducing condition? [2pts] c. Which will be more corrosion resistant in the passive state? [1pts] d. Which will be more easily passivated by dissolved oxidizers? [1pts] e. Which would be more easily protected by anodic protection? [1pts] Table 1- Parameters of the Active-Passive Alloys A, B, C, and D