Answer: i think the force will be a little smaller and the other force pulling left will be 0 
Explanation:
 
        
             
        
        
        
A demarc is where one network ends and another begins. Demarc stands for demarcation point. It is the physical point at which the public network of a telecommunications company ends and the private network of a customer begins.
However, the distinction between where one category of network begins and another ends is sometimes blurry.
 
        
             
        
        
        
Answer: For decreased chances of rejection 
Explanation: 
The three higly polymorphic MHC 1 genes in human beings are HLA-A, HLA-B and HLA-C.
These determine the compatibility of the organ or tissue in the recipient's body each by the help of many alleles that segregates in a population.
There are very less chances that a random chosen donor will match the a recipient six allele genotype.
This is the reason parent  may be the best donor for organ transplantation or tissue transplantation.
 
        
             
        
        
        
D all of the above but still not sure