$1-$ Ask for a username and password to login to a program. Log in to the program when the user name and password are entered correctly. You have $3$ rights to enter the program. Exit the program when entered incorrectly $3$ times. Make separate checks for username and password $(10$ points$).$

$2-$ The program consists of Vehicle Entry to the Park, Vehicle Exit from the Park and Program Exit, depending on the user's choice. In the Vehicle Entry menu, if the number of vehicles is $20,$ it will give a Car Park Full warning, if not, take the license plate from the user and show the number of vehicles entered. In the Vehicle Exit menu, it should ask for the license plate and how many hours are left. If there is $1$ hour left, pay $5TL,$ if $2$ hours are left, $10TL,$ if $3$ hours are left, $15TL,$ and if more than $3$ hours, $40TL.$ Also, reduce the number of vehicles. The program stops when $-1$ is entered $(20$ points$).$

Program Output:

Vehicle Entry $(1)$

Vehicle Exit $(2)$

Program Exit $(-1)$

Your choice:

$3-$ An Internet Service Provider company rates its customers' Internet speed usage. Ask the user how many Mbps Internet they are using. Write the code and flowchart that finds the amount the customer has to pay accordingly $(10$ points$).$

$\backslash$table$[[$Internet Speed,Campaign Payment$],[16Mbps$ Internet,$133,00TL$