Answer :

Sure, let's go through each mathematical operation step-by-step.

### Part (a)
We need to find the sum of 4 and 2.

- Step 1: Identify the numbers to add: 4 and 2.
- Step 2: Perform the addition:
- [tex]\(4 + 2 = 6\)[/tex]

Thus, [tex]\(4 + 2 = 6\)[/tex].

### Part (b)
We need to find the result of subtracting 3 from 16.

- Step 1: Identify the numbers to subtract: 16 and 3.
- Step 2: Perform the subtraction:
- [tex]\(16 - 3 = 13\)[/tex]

Thus, [tex]\(16 - 3 = 13\)[/tex].

### Part (c)
We need to find the sum of 5 and 7.

- Step 1: Identify the numbers to add: 5 and 7.
- Step 2: Perform the addition:
- [tex]\(5 + 7 = 12\)[/tex]

Thus, [tex]\(5 + 7 = 12\)[/tex].

### Summary of Results
- Part (a): [tex]\(4 + 2 = 6\)[/tex]
- Part (b): [tex]\(16 - 3 = 13\)[/tex]
- Part (c): [tex]\(5 + 7 = 12\)[/tex]

If you have any questions or need further clarification on any of the steps, feel free to ask!