using the approval compliance visualization, what statement provides the best summary a$.$ for purchase order under $$5000,$ there are more approvals made by a manager compared to a self approver. b$.$ for purchase orders $$5000$ and over, there is a compliance of $6\mathrm{.}2\%$ c$.$ for purchase orders $$5000$ and over, there is a non$-$compliance of $9\mathrm{.}9\%$ d$.$ For purchase orders $$5000$ and over, there are more approvals made by a director compared to a manager.