Zinc can displace _______ from `CuSO_4` solution, but cannot displace _______ from `MgSO_4` solution.

Explanation

To solve the question, we need to fill in the blanks regarding the displacement reactions involving zinc and two different sulfate solutions: `CuSO4` and `MgSO4`.

### Step-by-Step Solution:

1. **Understanding Displacement Reactions**:
Displacement reactions occur when a more reactive metal displaces a less reactive metal from its compound in solution.

2. **Identify the Metals in the Compounds**:
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