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I. Write C programs to display the following patterns using nested loop construct.

a.
1 2 3
1 2 3
1 2 3
1 2 3
1 2 3

b.
1 2 1
1 2 1
1 2 1
1 2 1
1 2 1

c.
4 3 2 1
4 3 2 1
4 3 2 1
4 3 2 1
4 3 2 1

d.
      2
   2 3 4
2 3 4 5 6

e.
      1
   1 2 1
1 2 3 2 1

f.
         *
      * * *
   * * * * *
* * * * * * *
   * * * * *
      * * *
         *

g.
x             x
x x          x x
x x x       x x x
x x x x    x x x x
x x x x x x x x x x

2. Modify the solution of question no. 1 to accept the number of lines as the input. The program should make the display pattern accordingly (Hint: write separate programs).

3. Extend the programs of Example 5.6 and Example 5.7 to make it dynamic by accepting the number of lines as an input from the keyboard.

4. what is a nested loop? Why do one use nested loops in our programs?

5. Do we need to use same type of loops as outer and inner loops? Justify your answer with some code segments.

6. Can we put a third loop inside the inner loop of a nested loop constract? Write a C program to justify your answer.

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