1. Write and briefly explain a single C program considering the following activities: a. Declare variables to store three sides of a triangle. The variable should be able to be accessed from any function of the C program. b. Prepare a user-defined function that will ask the user for the three sides and take them as user input. c. Prepare another user-defined function to calculate the area from three sides. [Hints: area = V[s(s-a)(s-b)(s-c)] where, s = (a + b + c)/2] d. Call the above two user-defined functions so that when you run your program, it will first ask three sides, take the inputs, calculate the area, and print the result. N.B. 'user-defined function' mentioned in this question is not a 'main' function.

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