Hi there please help me to solved this problem

"Create a 'Confirmed no. of mentees on all projects' field in Contracts & Pipeline object. For each Project related to a Contract there is a User Engagement related list. In each User Engagement related list there is a mentee record and a mentor record.  We need to know the number of registered mentees on each project which can be taken from 'Total Registered Mentees' The 'Confirmed no. of mentees on all projects' field (at Contacts level) should contain the sum of all 'Total registered users' for each User Engagement record where Type = Mentee through Flow Builder