1. There are many standard types of business letters, and each of them has a specific focus. Explain the following types of business letters:     

1. Inquiry letters 

2. Cover letters 

3. Special request letters 

4. Sales letters 

5. Customer relations letters 

a. Follow-up letters 

b. Complaint letters 

c. Adjustment letters

d. Refusal-of-credit letters

e. Collection letters

 

(Please keep it simple nothing too long)