Hello, you haven't provided the programing language in which you need the code, I'll explain how to do it using Python, and you can follow the same logic to make a program in the programing language that you need. 
Answer:
1. # -*- coding: utf-8 -*-
2. #Python  
3. class Calculator:
4.     def add(self):
5.         print(a + b)
6.     def sub(self):
7.         print(a - b)
8.     def mul(self):
9.         print(a * b)
10.     def div(self):
11.         print(a / b)
12.  
13. obj = Calculator()
14. choice = 1
15. while choice != 0:
16.     a = int(input("\nEnter first number: "))
17.     b = int(input("Enter first number: "))
18.      
19.     print("\n0. EXIT")
20.     print("1. DIVISION")
21.     print("2. ADDITION")
22.     print("3. SUBTRACTION")
23.     print("4. MULTIPLICATION")
24.      
25.     choice = int(input("\nEnter your choice: "))
26.     if choice == 1:
27.         obj.div()
28.     elif choice == 2:
29.         obj.add()
30.     elif choice == 3:
31.         obj.sub()
32.     elif choice == 4:
33.         obj.mul()
34.     else:
35.         break
Explanation:
- From lines 1 to 12 we define the object with four methods, addition, subtraction, multiplication, and division. Each method contains the operation between two variables inside a print function
- On line 13 we instantiate our class 
- On line 14 we declare the variable choice that is going to store the operation that the user wants to perform
- On line 15 we declare a while loop, this is going to keep running the program until the user wants to exit 
- From line 16 to 18 we ask the user to enter two numbers 
- From line 19 to 24 we print the possible operation, assigning a number for each operation, this indicates to the user what number to press for what operation
- On line 25 we ask the user for the operation 
- From lines 26 to 35 we check the user input an accordingly we call the corresponding method to performs the operation 
 
        
             
        
        
        
"add-in" is pretty ambigious but I would go with true for this one.
        
             
        
        
        
The answer to this is OR..I think..Hope i helped
        
             
        
        
        
Answer:
Process Flowchart.
Data Flowchart.
Business Process Modeling Diagram.
 
        
             
        
        
        
Answer:
A
Explanation:
After you make a big goal you must make many small goals to reach it