Historical demand for a product is as follows:

DEMAND

April $55$

May $50$

June $75$

July $55$

August $80$

September $75$

Using a simple four$-$month moving average, calculate a forecast for October.

Note: Round your answer to $2$ decimal places.

Using single exponential smoothing with $\backslash$alpha $=0\mathrm{.}30$ and a September forecast $=61,$ calculate a forecast for October.

Note: Round your answer to $2$ decimal places.

Using simple linear regression, calculate the trend line for the historical data. Say the X axis is April $=1,$ May $=2,$ and so on$,$ while the Y axis is demand.

Note: Round your intercept value to the nearest whole number and slope value to $2$ decimal places.

Calculate a forecast for October using your regression formula.

Note: Round your answer to $2$ decimal places.