On 8th we went to Napa Valley. We toured around the Robert Mandavi Wines. We ere told about the requirement for labour for varied activities picking leaves, harvesting grapes and some other activities. There are some activities that cannot but be done with labour. Some other activities are mechanized. The topography, the sunshine and the closeness to bay gives the advantage to Napa Valley so that they could produce some of the godd wines. We ended the tour by tasting four different types of wines.