Section: b 1- Must string constants be enclosed in single quotes? a) True b) False 2- An identifier cannot begin with a numeric digit a) True b) False 3- Assembly language identifiers are (by default) case insensitive. a) True b) False 4- Assembler directives execute at runtime. a) True b) False 5- Is A5h a valid hexadecimal constant? a) True b) False 6- Must string constants be enclosed in single quotes? 7- True 8- False