1. State whether each of the following is true or false. If false, explain why. 1. a. Function printf always begins printing at the beginning of a new line. - False. printf prints output starting at the current cursor position, not necessarily a new line. 1. b. Comments cause the computer to display the text after // on the screen when the program is executed. - False. Comments are ignored by the compiler and do not produce output. 1. c. The escape sequence \n in a printf format control string positions the output cursor to the beginning of the next line. - True. \n moves the cursor to the start of the next line. 1. d. All variables must be given a type when they’re defined. - True. In C, every variable must have a declared type. 1. e. C considers the variables number and NuMbEr to be identical. - False. C is case-sensitive; these are different variables. 1. f. A switch expression can take integers, floats, and double as parameters. - False. switch expressions must be integral types (int, char, etc.), not float or double. 1. g. All arguments following the format control string in a printf function must be preceded by an ampersand (&). - False. Arguments are passed by value; ampersand is not used in printf arguments. 1. h. The remainder operator (%) can be used only with integer operands. - True. % works only with integers. 1. i. The arithmetic operators *, /, %, +, -, and – all have the same precedence. - False. *, /, % have higher precedence than + and -. 1. j. A program that prints three lines of output must contain three printfs. - False. One printf can print multiple lines using \n. 2. Exchange money between Eva and Faith. 2.1 Problem: Write steps and C program to exchange two real values input from keyboard and print results. 2.2 Steps: 1. Read two real numbers Eva and Faith. 2. Store Eva's amount in a temporary variable. 3. Assign Faith's amount to Eva. 4. Assign temporary variable to Faith. 5. Print the exchanged values. 2.3 Explanation: Use a temporary variable to swap values without losing data. 2.4 C program snippet: ```c #include int main() { float Eva, Faith, temp; printf("Enter two real values to be exchange: "); scanf("%f %f", &Eva, &Faith); printf("Values entered are Eva = %.4f and Faith = %.4f\n", Eva, Faith); temp = Eva; Eva = Faith; Faith = temp; printf("Values after exchange are Eva = %.4f and Faith = %.4f\n", Eva, Faith); return 0; } ``` 3. Correct the if statements. 3.1 a. Original: if(x = 10); Correction: if(x == 10) { printf("x is equal to 10\n"); } Explanation: Use == for comparison, remove semicolon after if. 3.2 b. Original: if(x≤10); Correction: if(x <= 10) { printf("x is less than or equal to 10\n"); } Explanation: Use <= operator, lowercase printf, remove semicolon. 3.3 c. Original: printf("The value is %d\n", &number); Correction: printf("The value is %d\n", number); Explanation: Remove & to print value, not address.