public function getEngagementForAllClientSurveys(Collection $client_surveys): array 	{ 		$category_engagement_values = [];  		foreach ($client_surveys as $client_survey) { 			$category_engagement_values[] = $this->izzPdfEngagementCalculationService->calculateApplicantEngagementPercentages($client_survey); 		}  		$array_keys = array_keys($category_engagement_values[0] ?? []); 		$count = count($category_engagement_values); 		$finnalCalcualtion['count'] = $count;  		foreach ($array_keys as $array_key) { 			$finnalCalcualtion[$array_key] = round(array_sum(array_column($category_engagement_values, $array_key)) / $count, 2); 		}  		return $finnalCalcualtion; 	}