Identify the internal control weaknesses for YNF Boston for the four BPMN diagrams. Provide a short answer response for each of the internal control categories $2-9$ listed below, describing the internal control weakness and indicating the process or processes where that control is NOT implemented $$ but should be $$ in the prototype YNF Boston system.

The Item $1$ control category is completed as an example.

Internal Control Categories

$1.$ Segregation of duties: Different persons should record sales $($YNF Boston Sales$)$ and cash receipts $($YNF Boston Cash Receipts$).$ Currently, there are no access controls implemented to prevent that.

$2.$ Field checks

$3.$ Validity checks

$4.$ Limit and range checks

$5.$ Reasonableness checks

$6.$ Completeness checks

$7.$ Preventive control

$8.$ Detective control

$9.$ Corrective control YNF Boston Purchases

YNF Boston Cash Disbursement