Time Month Sales

$1$ Jan$-162,075$

$2$ Feb$-162,150$

$3$ Mar$-162,250$

$4$ Apr$-162,250$

$5$ May$-162,250$

$6$ Jun$-162,250$

to download Tesla's monthly sales data for the United States automotive market from $2016-2020.$

$($i$)$ What is the predicted value of sales for January $2021$ using the following methods:

a$.$ Na$$ve

$24,675$

b$.$ Four$-$period moving average

$[$ Select $]$

c$.$ Three$-$period weighted moving average with weights $(0\mathrm{.}5,0\mathrm{.}3,0\mathrm{.}2)$

$[$ Select $]$

d$.$ Exponential smoothing with alpha $=0\mathrm{.}3$

$[$ Select $]$

e$.$ Exponential smoothing with alpha $=0\mathrm{.}7$

$[$ Select $]$

$($ii$)$ What is the linear trend line to predict the expected total sales?

$[$ Select $]$

$($iii$)$ Using the trend line in part $($ii$),$ predict the expected total sales for January and February of $2021.$

January:

$[$ Select $]$

February:

$[$ Select $]$