For the given five values 18, 25, 20, 36, 49, the three years moving averages are

21, 27, 35

The correct answer is Option (2) → 21, 27, 35 **

Given values: 18, 25, 20, 36, 49

Three-year moving averages:

$\frac{18+25+20}{3} = \frac{63}{3} = 21$

$\frac{25+20+36}{3} = \frac{81}{3} = 27$

$\frac{20+36+49}{3} = \frac{105}{3} = 35$

The three-year moving averages are 21, 27, and 35.