Understanding and implementing shell feature sketch blocks and Linear pattern in Solidworks

Please find the links to the completed solid works files of second week challenges

1) Oil Tank: https://drive.google.com/file/d/1gRZuEGYvhrgbiN9oglK9QeXjlJcB7zQf/view?usp=sharing

2) Pedal: https://drive.google.com/file/d/1CUYRjCTtbZWt53JQzvdEU0eYLV2OSGdW/view?usp=sharing

3) Chain: https://drive.google.com/file/d/1cEjfsJAwNClWSy-WKugN4DGoGH83VcX_/view?usp=sharing