Answer: Decrease, decrease
Explanation: Substitute goods are those goods that are used in place of each other. When the price of a substitute good falls, it becomes more attractive to the consumers. Here, wood planks and wood beams are substitutes to each other. So, when price of wood plank falls, demand for wood beams will decrease, shifting the demand curve to the left. As a result, of this the equilibrium price of wood beams and the quantity of wood beams will also decrease. 
 
        
                    
             
        
        
        
Answer
The answer and procedures of the exercise are attached in the following archives.
Step-by-step explanation:
You will find the procedures, formulas or necessary explanations in the archive attached below. If you have any question ask and I will aclare your doubts kindly.  
 
        
             
        
        
        
Answer:
1)
Some of the major reasons why Garden Haven might to choose to either  invest in debt or equity securities are as follows;
- They want to generate earnings. It is better to earn money from excess cash than keep it idle.
- They invest in debt or securities because they provide liquidity. Investments in debt or securities can be sold through exchange the day decision is taken to see and convert it cash
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- To meet cyclical cash needs.
- They may have policies as regard to quantum of cash that can be kept
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2)
In terms of classification, Garden Haven's investment falls in short term investments.
Investments made for a period less than a year are classified as short term investments. Investments made for longer than one year are classified as long term investments. Since Garden Haven is making this investment for four months, this is be classified as short term investment.
 
        
             
        
        
        
Grant. A grant, is a form of financial aid that doesn’t have to be repaid.