Question$3$: Economic Data

$$a$)$ Load econ$\_$data.xlsx excel file. Have the Date as the Index.

b$)$ Calculate simple percentage changes for each column time series and save as a new DataFrame. Use a function. Print the tail.

c$)$ Calculate descriptive statistics on the raw data and pct changes. $($see econ$\_$describe$\_$raw and econ$\_$describe$\_$pct below$)$

d$)$ Calculate correlation between all pct change columns. $($see econ$\_$corr below$)$

e$)$ Calculate covariance between all pct columns $($see econ$\_$cov below$)$

f$)$ Sort data on the index $($dates$)$ so they are descending $($see sorted$\_$data below$)$

g$)$ Remove $-$ values and FRED from columns to clean data columns and set these new column names for econ$\_$data. Note this should be done at beginning of data processing. $($See list and econ$\_$data below$)$