Answer the following questions in the provided lab solution report document and upload to Slate 1. Write an enhanced menu driven letter grades calculation program that will input a student grade (integer in the range 0 to 100) from the user and prints out the letter grade of that student using CONDITIONAL OPERATOR (expl ? exp2 exp3). The program loops until a grade of -1 (called sentinel value) is input to indicate that all grades are processed. Paste your code into the solution part of the lab solution template and add a screenshot of the output to the second part (screenshots), 2. What is the output of the following code fragments. Discuss the reason behind each a int a 10, b- 20, c-30; if (c> b> a) printf"TRUE else printf FALSE int febDays, year-2020 febDays year %4 ? 29 28 printf("Days in February: %d", febDays); b. 3. By adding parenthesis to clarify the sequence of calculation, write easily-comprehensible equivalent expressions to the following ones a 122-B &&4