<?php  namespace App\Services\Pdf\ComparativeReport\Services;  use App\Models\Answer; use App\Models\ClientSurvey; use Illuminate\Support\Collection; use Illuminate\Support\Facades\DB;  class GeneralReportCalculationService { 	public function calculateClientSurveyFinalGrade(ClientSurvey $client_survey, Collection $answers): string{}  	public function calculateClientSurveyGradeForSpecificCategories(ClientSurvey $client_survey, Collection $answers, Collection $categories): string{} }