The dataset includes $5,000$ transaction data.$$ The following is the summary of the transaction data:

$1.$ the number of transactions that include items A and B: $2,000$

$2.$ the number of transactions that include item A but not item B: $500$

$3.$ the number of transactions that include item B but not item A: $1,000$

$4.$ the number of transactions that do not include items A and B: $1,500$

Suppose that the association rule A $->$ B is mined. What are the support and confidence of this rule?

Group of answer choices

support $=20\%,$ confidence $=33\mathrm{.}3\%$

support $=50\%,$ confidence $=33\mathrm{.}7\%$

support $=40\%,$ confidence $=66\mathrm{.}7\%$

support $=50\%,$ confidence $=66\mathrm{.}7\%$

support $=40\%,$ confidence $=33\mathrm{.}3\%$