please help it is really confusing

$1.$ Calculate a forecast using a simple three$-$month moving average.

$2.$Calculate a forecast using a three$-$period weighted moving average. Use weights of

$0\mathrm{.}60,0\mathrm{.}30,$ and $0\mathrm{.}10$ for the most recent period, the second most recent period, and the third most recent period, respectively.

$3.$ Calculate a forecast using the exponential smoothing method. Assume the forecast

for period $1$ is $9,500.$ Use alpha $=0\mathrm{.}40.$

$4.$ Once you have calculated the forecasts based on the above data, determine the error terms by comparing them to the actual sales for $2020$ given below:

CASE QUESTIONS

Calculate a forecast using a simple three$-$month moving average.

Calculate a forecast using a three$-$period weighted moving average. Use weights of

$0\mathrm{.}60,0\mathrm{.}30,$ and $0\mathrm{.}10$ for the most recent period, the second most recent period, and

the third most recent period, respectively.

Calculate a forecast using the exponential smoothing method. Assume the forecast

for period $1$ is $9,500.$ Use alpha $=0\mathrm{.}40.$

Once you have calculated the forecasts based on the above data, determine the error

terms by comparing them to the actual sales for $2020$ given below:

Based on the three methods used to calculate a forecast for TFY$,$ which method

produced the best forecast? Why? What measures of forecast error did you use?

How could you improve upon this forecast?