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Which of the following is true about open source software?

a. The program code is confidential. b. The program can be changed and is freely distributed. c. The program can be freely distributed as long as the program code is not changed. d. The program code is subject to copyright protection.

Answer the following statements true (T) or false (F)

1) Method Insert can be used to insert various data types into a given position of a StringBuilder. 2) Method Insert can be used only on the primitive data types. 3) Method Remove can be used to delete any part of a StringBuilder. 4) Replace is a method that allows the user to change any character in a StringBuilder to the given argument. 5) structs are like classes in that they encapsulate reference types.