Please us the csv file and answer the question by R studio https://github.com/wampeh1/Ecog314_Spring2017/blob/master/Lecture5/lending_club_loans.csv
	# ----------#
	# load the dplyr library
	#--------------#
	# Exercise 1
	# -------------#
	########
	# Part a
	# Read in the raw data and assign it to lending_club.
	# HINT: Be sure to read characters in as characters and not as factors
	# What are the dimensions of the lending club data frame?
	##########
	# Part b
	# Take a look at your loans data frame by calling it in the console,
	# does the formatting look good, are the types correct?
	# What is the type of the following variables (use the typeof() function):
	# id, term ,int_rate, loan_amnt, issue_d, and installment?
	###########
	# Part c
	# Create a new data frame called lending_club_small and keep the following columns:
	# id, loan_amnt, funded_amnt, term, int_rate, installment, grade, emp_length,
	# home_ownership, annual_inc, issue_d, loan_status, total_acc, addr_state.
	lending_club_small <-
	###########
	# Part e
	# What does the substr function do?
	# what arguments does it use?
	## ANSWER HERE