Hello please I want only the answers, no explanation. Thank you!

Question 1 12 pts Answer the following questions as valid or invalid C++ identifier. To avoid misspelling, copy and paste your answers. 1. invalid? 2. invalid 3. Invalid 4. First name 5. First-name 6. First_Name Evaluate each of the following expressions. inta,b,c,d,e,f;a=1b=2c=ad=++b Find values of a,b,c, and d after the above piece of code is execu ted. a=b=c=d= Find the values of the variables after the following piece of code is executed. int i,a,b,c,d; a=1; b=1; c=1; d=1; for (i=1;i