Section 4: if/else, scanner, return thursday, october 17 exercises: solve the following problems on paper and bring your sheet of paper to your section on thursday. programming exercise 4.1 (fractionsum, p309). remember that you can use practiceit to solve this problem. if you do, either print what you end up with so that you can turn it in or copy the code to your paper. programming exercise 4.12 (printtriangletype, p311). remember that you can use practiceit to solve solve this problem. if you do, either print what you end up with so that you can turn it in or copy the code to your paper.