For the given five values $15,24,18,33,42$, the three years moving averages are

$19,25,31$

The correct answer is Option (2) → $19,25,31$

Given values

$15,\;24,\;18,\;33,\;42$

Three year moving averages are calculated as follows

First moving average

$=\frac{15+24+18}{3}=\frac{57}{3}=19$

Second moving average

$=\frac{24+18+33}{3}=\frac{75}{3}=25$

Third moving average

$=\frac{18+33+42}{3}=\frac{93}{3}=31$

The three years moving averages are $19,\;25,\;31$.