Electrochemical cells (2010 NSW HSC)

1)The diagram shows a galvanic cell.

Which of the following metals (M) acting as an anode would produce the lowest theoretical potential for the cell?
(A) Calcium
(B) Copper
(C) Iron
(D) Manganese

2) The diagram shows a particular cell with relevant half equations.

Identify the anode, cathode and electrolyte for this cell.