The president of Small Business Australia believes that the number of ownermanagers of unincorporated businesses in Australia (000s) has been evidencing an exponential trend since 2004. He uses Microsoft Excel to obtain the output below. The dependent variable is the log base 10 of the number of ownermanagers, while the independent variable is period, where 2004 is coded as 1, 2005 is coded as 2, etc.

Model is given by: Log₁₀(Owner Managers_t ) = ₀+₁(period_t )+e_t

Weekly toy sales (in $1000s) in a department store for the past three months are shown below.

Month	Week	Sales
1	1	14
	2	22
	3	20
	4	16
2	1	18
	2	20
	3	24
	4	20
3	1	22
	2	26
	3	24
	4	18

Compute the centred 4 week moving average.

Calculate the forecast for demand in 2025.