Link for Session 2:
https://drive.google.com/open?id=0B31kv7IFvXLca1RlaFRBal9VYWM
Link for Session 3:
https://drive.google.com/open?id=0B31kv7IFvXLcbE01MTFkVlBwZEE
dplyr package zipfile:
https://drive.google.com/open?id=0B31kv7IFvXLcUmRpSG9KSTNfb2c
https://drive.google.com/open?id=0B31kv7IFvXLca1RlaFRBal9VYWM
Link for Session 3:
https://drive.google.com/open?id=0B31kv7IFvXLcbE01MTFkVlBwZEE
dplyr package zipfile:
https://drive.google.com/open?id=0B31kv7IFvXLcUmRpSG9KSTNfb2c