Given the class 'readonly' with the following behavior:
a (protected) integer instance variable named 'val'.
a constructor that accepts an integer and assigns the value of the parameter to the instance variable 'val'.
a method name 'getval' that returns the value of 'val'.

write a subclass named 'readwrite' with the following additional behavior:
any necessary constructors.
a method named 'setval' that accepts an integer parameter and assigns it the the 'val' instance variable.
a method 'isdirty' that returns true if the setval method was used to override the value of the 'val' variable.

explanation:

d. long term memory

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the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.