how would i answer this question? also what is a type, cardinality and participation ?

1 mark per entity identified (to a max of 4 ), 1 extra mark for sensible description of each entity b) Describe any two relationships identified in the specification defining for both, the : i. Type ii. Cardinality iii. Participation ensure you detail the assumptions you make in each case 8 marks For any relationship identified in the diagram above offer: - 1 mark for the correct Name - 1 mark for the correct Cardinality - 2 marks for the correct Participation Take valid assumptions into consideration c) Identify one of the following within any of the entities identified in b): i. A possible simple key with explanation ii. A possible composite key with explanation 4 marks 2 marks for any valid simple key description 2 marks for a composite key from Vacancy or Application