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In the Java language, answer question below: 5. Given below are descriptions of some computer programs. Each of them reads a text file from standard

In the Java language, answer question below:

5. Given below are descriptions of some computer programs. Each of them reads a text file from standard input. For each of them, specify:Which APIs would you use. Choose from APIs discussed in class: List/Map/SetWhich implementations of the APIs would you use, e.g. LinkedList / HashSet / Tree ...Describe how you would use the API to implement the program. Give pseudo code or describe step by step how your program would work. No need to write an actual program.Give the time complexity of your program in terms of the number of words or lines read (which ever is appropriate). Try to make your programs as simple and efficient as possible. What the programs should do:

(a) Print lines of the file in reverse order.

(b) Print all different words in the file, each word printed exactly once (order not important).

(c) Print all different words in the file, with each word print how many times it occurs in the file(order not important).

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