1. Write an algorithm that accepts an integer number and prints its previous and next numbers.
2. Write an algorithm that reads the length of the base and the height of a right-angled triangle and prints the area. The area of a right angled-triangle is 1/2 x base x height.
3. Write an algorithm that accepts three values that represent cost of order, tip percentage, and tax percentage and calculates and displays the final purchase cost/price.
4. Women's Olympic boxing is divided into five weight classes (based on the 2020 Tokyo Games):
   • flyweight, 112 pounds (51 kg)
   • featherweight, 126 pounds (57 kg)
   • lightweight, 132 pounds (60 kg)
   • welterweight, 152 pounds (69 kg)
   • middleweight, 165 pounds (75 kg)

Write an algorithm that takes a real positive number that represents the weight of a boxer in pounds. The algorithm should print a message indicating the weight class the boxer is assigned based on this breakdown.