Problem 1. (2pts)

Many languages distinguish between uppercase and lowercase letters in user-defined names. What are the pros and cons of this design decision?

Problem 2. (2 pts)

How do type declaration statements for simple variables affect the readability of a language, considering that some languages do not require them?

Problem 3. (2 pts)

Many contemporary languages allow two kinds of comments: one in which delimiters are used on both ends (multiple-line comments), and one in which a delimiter marks only the beginning of the comment (one line comments). Discuss the advantages and disadvantages of each.