QUESTION TWO

a$)$ A company's sales of product WEP are shown quarterly over three years in the following table.

$\backslash$table$[[$Year$,$Quarter,Sales,$],[2019,1,14,],[,2,18,],[,3,40,],[,4,10,],[2020,1,12,],[,2,19,],[,3,44,],[,4,15,],[,1,17,],[,2,12,],[,3,39,],[,4,11,],[,,,],[,,,],[,,,]]$

Required

i$.$ Compute the trend line for the data

$(6$ marks$)$

ii$.$ Estimate the seasonal factors in each quarter

$(4$ marks$)$

iii. Use your results to forecast $($to the nearest whole numbers$)$ the company's sales of product WEP in the four quarters of the year $2022$

$(4$ marks$)$