Problem $1$: Voting Eligibility Checker

Write a Java program that prompts the user to enter their age. The program

should then determine if the person is eligible to vote based on the

following conditions:

If the age is $18$ or above, display "You are eligible to vote."

If the age is below $18,$ display "You are not eligible to vote yet."

Problem $2$: Shipping Fee Calculator

Write a Java program that calculates the shipping fee for an online

purchase based on the following conditions:

If the total purchase amount is $$100$ or more, the shipping is free.

If the total purchase amount is less than $$100,$ but the weight of the

package is less than or equal to $10kg,$ the shipping fee is $$5.$

If the total purchase amount is less than $$100$ and the weight of the

package is more than $10kg,$ the shipping fee is calculated based on the

following:

For weights between $10kg($inclusive$)$ and $20kg($exclusive$),$ the

shipping fee is $$10.$

For weights between $20kg($inclusive$)$ and $30kg($exclusive$),$ the

shipping fee is $$15.$

For weights above $30kg,$ the shipping fee is $$20.$

The program should prompt the user to enter the total purchase amount

and the weight of the package. Then, it should calculate and display the

shipping fee based on the given conditions.