$1.$ Write a python program to print the grade of a student based on Test score using nested if$-$else conditions.

Test Score Grade

$90$ and above A

$8089$ B

$7079$ C

$6069$ D

Below $60$ F

$2.$ Write a python program to check if a password is valid or not. A password is valid if :

a$.$ The total length of password should be greater than $5$ but less than or equal to $10.$

b$.$ All characters should be uppercase.

$3.$ Write a python program to check if a number is a multiple of $2$ but not $3.$

$4.$ What should be the values of a $,$b and c for the output result to be TRUE. $($a$,$ b$,$ c are Boolean values$).$

result $=($a and b$)$ or $($c and $($not b$))$

Print the result in the output.

$5.$ Print below pattern using for loop.

$*****$

$****$

$***$

$**$

$*$

Note: Do not hardcode the values or do not use multiple print statements for the output. Just solve using for loop.