Select the best statement:

$1.$Work methods are standardized in Lean to minimize employee errors and training needs

$2.$ Large batch production is favored in Lean to take advantage of economies of scale

$3.$Total Quality Management requires that quality assurance be done by a certified Lean Six Sigma Yellow Belt, Green Belt, or Black Belt.

$4.$ Keeping excess inventory to minimize disruptions at bottleneck process activities is an important Lean strategy

$5.$ Water spiders can be used to minimize disruption at bottleneck activities in a production process