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Answer:
a. x^<i>(j)
Explanation:
The solution has been explained in the question; however, I will provide further explanation.
The sequence to access a word is:
Training example --> Word
In other words, you first access the training example, before you gain access to the word being searched for.
Rewrite the following:
Training example --> Word
as:
ith training example --> jth word
Hence, the representation is:

The second generation of home consoles occurred from (1976-1988) at this time the most popular and consoled regarded as best was the Atari 2600
Answer:
c) PaaS
Explanation:
Refined and restrictive service model allows the user to use full package of application stack as demand by the service. It should be noted that "PaaS" is the most refined and restrictive service model.
Platform as a Service known as (PaaS ) is computing platform that gives room for the user in the cloud to manage applications.
PaaS helps to overcome the problem in managing the complexity of software licence. Example of PaaS are window Azure,Apache Stratos.