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Looking at the ruler and the marked points on it, we can deduce the following:

### Explanation:
- The ruler shows markings in inches with 1/16th divisions.
- Each main segment (between whole numbers like 1, 2, 3) is divided into 16 parts, so each small tick represents \( \frac{1}{16} \) inch.
  
Based on the points labeled a, b, c:
1. **Mark "a"** is at \( \frac{5}{8} \) inch. This is shown in the question.
2. **Mark "b"** is at \( 1 \frac{1}{8} \) inch. Also shown in the question.
3. **Mark "c"** appears at \( 2 \frac{3}{16} \) inches. It is three small ticks past the 2-inch mark, where each tick represents \( \frac{1}{16} \).

Thus:
- (a) is \( \frac{5}{8} \) inches
- (b) is \( 1 \frac{1}{8} \) inches
- (c) is \( 2 \frac{3}{16} \) inches.

Do you have any questions about this? Would you like further details?

### Related Questions:
1. What is the next fraction if the mark falls between \( \frac{7}{8} \) and 1 inch?
2. How would the markings differ on a ruler with 1/32 inch divisions?
3. How do you simplify fractions like \( \frac{3}{16} \) when working with measurements?
4. How can you convert fractional inches to decimal format (e.g., \( \frac{5}{8} \))?
5. What is the mathematical significance of reducing fractions to their simplest form?

### Tip:
When using a ruler, the smallest ticks often represent fractions like \( \frac{1}{16} \) or \( \frac{1}{8} \). It's helpful to count the number of ticks between two main divisions to identify the exact fraction.

Learn how to find and simplify fractional measurements using a ruler. This guide walks through identifying marks on a ruler, reading fractional inch measurements, and simplifying fractions. Perfect for students in Grades 4-6.

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