Exercise $2$:

Create a function is$\_$ordered that receives a sequence and returns True if the elements are in sorted order. Test your function with sorted and unsorted lists, tuples, and strings.

Exercise $3$:

Insert $20$ random letters in the range $\text{'}$a$\text{'}$ through $\text{'}$f$\text{'}$ into a list. Perform the following tasks and display your results:

a$.$ Sort the list in ascending order.

b$.$ Sort the list in descending order.

c$.$ Get the unique values and sort them in ascending order.