What are some key considerations when using the market$-$based approach to forecasting? Select all that apply.

$1.$Focusing primarily on the company's internal data sources, such as financial statements and sales reports, to ensure the accuracy of market share and revenue margin assumptions

$2.$Gathering industry data from a single, authoritative source to streamline the forecasting process and ensure consistency

$3.$Adjusting forecasts based on changes in the competitive landscape and market conditions, but only on an annual basis to maintain stability

$4.$Selecting industry data that closely aligns with the company's specific business model and target market to enhance the relevance and reliability of forecasts

$5.$Documenting and sharing the sources used for external estimates and industry projections to promote transparency and facilitate collaboration among stakeholders