13. What will be assigned to the variable s_string after the following code executes? special '25800 Carlos Bee s_string speciall :4] a. c. *258 d. '2580 b. 25 e. 25800 14. What will be assigned to the variable s string after the following code executes? special '25800 Carlos Bee' s_string special/7: 1 a. 'Carlos Bee b. 'arlos Bee d. none of the above 15. What will be the value of the variable string after the following code executes? string 'Hello string'world! a. 'Hello b. world!" 'Hello world!" Nothing: this code is invalid c. d. 16. An operator is a- a) function that determines the type of a piece of data. b) statement that assigns a value to a variable. c) special symbol that performs a specific operation. d) All of the above. 17. The three types of selection structures are: a) for, if, if lelse b) for, while, if c) if, if /else, while d) if, if lelse, if /elif lelse e) none of the above 18. Given x -7 and y- 11, which of the following conditions, a) to d), would cause a while structure to st executing (which condition is False)? a) (x