Import historical Microsoft$$s stock price data $1990/01/01$ to $2020/12/01$ into the RStudio and declare the dataset as time series

$2.$ Perform variance decomposition

$3.$ Build Holt$-$Winters Model $($you can either fix or relax parameters, it is your choice$)$

$4.$ Provide visual aid that demonstrates the fit of your model

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Plot the data $$ time series plot

$3-$ Build & compare forecasting models