Answer: provided in the explanation segment
Explanation:
To begin we will answer each part accordingly.
For Requirement 1 :  
I would say that Excel Motors should use the Equity method to account for its investment in Dynamic Motors, because the investment results in significant influence over the investment company.
For Requirement 2 :  
In the books of Excel Motors: we have that;
Transaction/ Event   Date	Accounts&Explanation   Debit ($
)  Credit($
)
 
     1.     Jan 6, 2018   Investment in Associate	240,000,000    
                                                         Cash                            240,000,000
Accnt&Explan: To record cash paid for equity investment in Dynamic Motors.  
    
     2.              Cash ( $ 15,000,000 x 45%)      6,750,000  
                         Investment in Associate                         6,750,000
Accnt&Explan:To record dividend received in cash from Dynamic Motors  
    
 3.	Investment in Associate ( $ 10,000,000 x 45%)	4,500,000  
                                            Investment Revenue                        4,500,000
Accnt&Explan:To record income earned on equity investment	
For Requirement 3:
  Equity Investment in Dynamic Motors:
                Cash      240,000,000           Cash                 6,750,000
Investment Income	4,500,000  
                                                                        Ending Balance	237,750,000
                                       244,500,000  244,500,000	
The balance would be classified as a non-current asset on the balance sheet dated December 31, 2018
cheers i hope you understand, this is actually in a tabular form.