A Transport Company is requested for a software and asked for the following functionalities.
o Client name, contact, email and transection (only one) are important to keep.
o Client can buy or sell car through pinwheels. The transection details which are important
to keep are date (day), transection type (Buy or Sell) and amount.
Implement the above demand in such a way what if the client is deleted, none of its transection
record will remain. (Use Composition)
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