PLEASE COMPLE ER-DIAGRAM WITH A EXPLANATION this all the info

A gym maintains EQUIPMENT. Each item of EQUIPMENT must be tested by a STAFF member each month. If the equipment is in need of repair, then it must be sent for repair to the VENDOR. The management of the gym wishes to log when the machine went in for repairs, what was done, the cost, when it was returned and what VENDOR was used. In addition, management would like to record test dates.