Rendition workflow related doubt.

Hi All,

a] If I create a workflow in AEM 6, with the below mentioned step[as seen in the screenshot] then basically I am creating a worlflow that will create a jpeg image in rendition 2:1 and skipping the mentioned formats with quality 90, correct?

b] If I give dimension as 900:300 in the above with other parameters as-is, then I will be creating an image with rendition 3:1.Is that correct?

Went through https://docs.adobe.com/content/docs/en/cq/5-6-1/javadoc/com/day/cq/dam/core/process/CreateWebEnabledImageProcess.html

Any thoughts on this will be helpful.