Hi Could you please answer this difficult question. Could you also provide explanation of working and pay attention to the marking key. Thanks

a Correct numbers with explanation: 1 mark b A convincing explanation: I mark 6 Correct number with explanation: I mark cl Correct numbers with explanation: 1 mark The proper factors of a number n are the factors which are less than n. A number n is deficient if the sum of its proper factors is less than n. For example, 22 is deficient since 1 + 2 + 11 = 14