Given the order-requirement digraph below (with time given in minutes) , apply the critical-path scheduling algorithm to construct a schedule using two processors. How much time does the resulting schedule require? 
Definitions:
Researching Grapes
A focused study or examination related to grape varieties, cultivation techniques, or the impact of environmental factors on grape production, often for winemaking purposes.
Wine Barrel
A cylindrical container typically made of oak wood used for the aging, fermentation, or storage of wine, imparting flavors and aiding in the wine's development.
Upstream Cost
Costs incurred before the production process begins, typically involving raw material acquisition and preparation.
Wine Barrels
Large containers traditionally made of oak, used for aging wine and imparting flavors during the winemaking process.
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