Part1: Please use the code and answer the questions. HW4code-1.R
# 1- what is the maximum number of clusters for this dataset?
# 2- Base on the plot, what do you think the appropriate cluster we need to choose for this data, and why you think that is good?
# 3- What is the number of phones in the cluster 2 when the number of clusters is 3?
# 4- What is the number of phones in the cluster 3 when the number of clusters is 4?