Problem $18-3($Algo$)$

Given the following history, use a three$-$quarter moving average to forecast the demand for the third quarter of this year. Note, the $1$st quarter is Jan, Feb, and Mar; $2$nd quarter Apr, May, Jun; $3$rd quarter Jul, Aug, Sep; and $4$th quarter Oct, Nov, Dec.

$\backslash$table$[[,$JAN,FEB,MAR,APR,MAY,JUN,JUL,AUG,SEP,OCT,NOV,DEC$],[$Last year,$150,170,190,225,235,250,195,185,175,250,275,295],[$This year,$170,190,175,245,270,215,,,,,,]]$

Forecast for the third quarter