a$)$ Load the adjusted$\_$closes.xlsx excel file. Make sure set the Date as the index column.

b$)$ Extract MSFT adjusted close column as a series.

c$)$ Now convert this series back to a DataFrame.

d$)$ Check if there is any NaN missing data in adjusted$\_$close DataFrame.

e$)$ Count if any missing data in adjusted$\_$close DataFrame.

f$)$ Extract rows $"2000-01-03","2014-08-14"$ from adjusted$\_$close DataFrame to a separate DataFrame.

g$)$ Now add an integer as the index instead of dates.

h$)$ Extract row numbers $1,50,100,200.$

i$)$ Remove AMZN column from adjusted$\_$close DataFrame.