$5\mathrm{.}5($IPython Session: Slicing$)$ Create a string called alphabet containing 'abcdefghijkmnopqrstuvwxyz', then perform the following separate slice operations to obtain:

a$)$ The first half of the string using starting and ending indices.

b$)$ The first half of the string using only the ending index.

c$)$ The second half of the string using starting and ending indices.

d$)$ The second half of the string using only the starting index.

e$)$ Every second letter in the string starting with $\text{'}a\text{'}.$

f$)$ The entire string in reverse.

g$)$ Every third letter of the string in reverse starting with $\text{'}z\text{'}.$