An expert working on finding the most optimal clustering of the data via the ubiquitous kMeans clustering algorithm has found the following total within cluster sum of squares (TWCSS): 1. Compute the minimum number of clusters for an expert who needs to explains at least 80% of the variation capture and explained by the kMeans clustering machinery. 2. Construct a sketch of the scree plot of percentage of variation explained by this kMeans clustering machinery