pros and cons of top down-budgeting vs. bottom-up budgeting

In 750 words or less, discuss the pros and cons of top down-budgeting vs. bottom-up budgeting

1. Introduction 

2. What is Bottom-up budgeting  

3. Advantages and Disadvantages of bottom-up budgeting

4. What is Top-down budgeting

5. Advantages and Disadvantages of Top-down budgeting

6. Conclusion 

Need information for

1. Introduction 

2. What is Bottom-up budgeting  

 and

6. Conclusion