A workshop has a manager and a pool of mechanics. When a customer arrives, the manager inspects customers car and prepares a task sheet. Manager than assigns this task sheet to one or more mechanics. Attributes of manager are employed-id, name, address and phone. Attributes of mechanic are employed-id, name, address, phone and specialty. Attributes of customer are customer id, name, phone. Attributes of task sheet are task id, description, start date, finish date, part number (These are the parts that were purchased during repair work). Attributes of Bill are Bill number, cost of work, cost of parts. A mechanic can be assigned more than one car over a time period. A car can be assigned more than one mechanic but at least one mechanic is must assigned. Develop an ERD for this problem.