It should start with outlining a research paradigm, define that the philosophy is pragmatism as a mixed approach of qualitative and quantitative approaches will be used (justification from academic sources to support why the philosophy and approach are selected)
Data collection method Focus group is selected as the qualitative method. Require justification to explain why focus group is the suitable method for this research topic. Explained how a pilot test will be conducted to test the skills of the moderator and flow of the focus group (and backed by support why this is necessary)
Online questionnaire Focus group is selected as the quantitative method. Require justification to explain why focus group is suitable method for this research topic.