If equal volumes of iron and copper (look up Table A-1 for densities) are melted together, determine

Question:

If equal volumes of iron and copper (look up Table A-1 for densities) are melted together, determine
(a) The specific volume.
(b) Density of the alloy. Assume no change in the final volume.
(c) What-if Scenario: What would the answers (specific volume and density) be if equal masses of iron and copper were melted together?