Update f22/andy_lec_notes/lec39_Dec12_Plotting4/lec38_plotting4_complete.ipynb, f22/andy_lec_notes/lec39_Dec12_Plotting4/lec38_plotting4_template.ipynb, f22/andy_lec_notes/lec39_Dec12_Plotting4/readme.md
Deleted f22/andy_lec_notes/lec21_copying_answers.pdf, f22/andy_lec_notes/lec_27_850.ipynb

Update f22/andy_lec_notes/lec37_Dec07_Plotting2/lec_37_plotting2_scatter_plots_template.ipynb, f22/andy_lec_notes/lec37_Dec07_Plotting2/lec_37_plotting2_scatter_plots.ipynb
Deleted f22/andy_lec_notes/lec37_Dec07_Plotting2/lec36_plotting2_850.ipynb, f22/andy_lec_notes/lec37_Dec07_Plotting2/lec36_plotting2_complete.ipynb

Update f22/andy_lec_notes/lec39_Plotting4/lec38_plotting4_complete.ipynb, f22/andy_lec_notes/lec39_Plotting4/lec38_plotting4_template.ipynb, f22/andy_lec_notes/lec39_Plotting4/readme.md

Update f22/andy_lec_notes/lec36_Dec05_Plotting1/.ipynb_checkpoints/lec_35_template-checkpoint.ipynb, f22/andy_lec_notes/lec36_Dec05_Plotting1/bus.db, f22/andy_lec_notes/lec36_Dec05_Plotting1/lec35_plotting1_complete.ipynb, f22/andy_lec_notes/lec36_Dec05_Plotting1/lec35_plotting1_template.ipynb, f22/andy_lec_notes/lec36_Dec05_Plotting1/readme.md, f22/andy_lec_notes/lec37_Dec07_Plotting2/iris-flowers.db, f22/andy_lec_notes/lec37_Dec07_Plotting2/iris.csv, f22/andy_lec_notes/lec37_Dec07_Plotting2/lec36_plotting2_850.ipynb, f22/andy_lec_notes/lec37_Dec07_Plotting2/lec36_plotting2_complete.ipynb, f22/andy_lec_notes/lec37_Dec07_Plotting2/readme.md, f22/andy_lec_notes/lec38_Dec09_Plotting3/fire_hydrants.csv, f22/andy_lec_notes/lec38_Dec09_Plotting3/lec37_plotting3_complete.ipynb, f22/andy_lec_notes/lec38_Dec09_Plotting3/lec37_plotting3_template.ipynb, f22/andy_lec_notes/lec38_Dec09_Plotting3/readme.md