Do not use any print$()$ statements unless expressly told to do so$.$ Store all results in a variable. $$ When possible, try to answer the question in more than one way to demonstrate your programming chops! Key Value Student Number Grade $(\%)10552366\mathrm{.}71487$

$1.$ Write a Python script to construct the initial dictionary

$2.$ Write a Python script to add a student to the dictionary: Student $99$ with a grade of $55\%$

$3.$ Write a Python script to check whether Student $38$ is in the class. Challenge: Write the solution in two ways

$4.$ Write a Python script to get Student $10$s grade.

$5.$ Write a Python script to get Student $38$s grade.

$6.$ Write a Python script to check whether anyone got $50\%$ in the course.

$7.$ Write a Python script to see how many people got $55\%$ in the course. Use library functions.

$8.$ Write a Python script to see how many people got $55\%$ in the course. Do not use any list library functions.

$9.$ Write a Python script to check whether anyone got over $50\%$ in the course.

$10.$ Write a Python script to find everyone who got over $50\%$ in the course.

$11.$ Draw a memory diagram of the following code to visualize its execution and identify the lesson to be learned about dictionaries $($and lists and sets$)$

grades$\_$before $=$ grades.values$()$

del grades$[23]$

#grades.pop$(23,$ None$)$

#grades.pop$(23)$

grades$\_$after $=$ grades.values$()$

Challenge: We will see sorting algorithms later in the course $12.$ Write a Python script that sorts this dictionary, returning the list of student numbers in ascending order, along with their grade.