Consider the following streams of events which are captured respectively as table and stream in ksqlDB.

Customer Stream

Time	Key	Value
1	C1	{cust1, A1}
1	C2	{cust2, A2}
1	C3	{cust3, A3}
2	C4	{cust4, A4}
2	C1	{cust1, AX}
3	C1	{cust1, AY}
3	C3	{cust1, AZ}

Order Stream

Time	Key	Value
1	O1	{C1, 50}
1	O3	{C2, 20}
1	O3	{C2, 30}
2	O1	{C1, 40}
3	O3	{C2, 10}
3	O2	{C3, 25}

1. What are the events present in the Order data stream at the end of time unit 3?
2. What are the events present in the Customer Table at the end of time unit 3?
3. What will be the result of left outer join of Customer stream with Order stream at end of time unit 1?
4. What will be the result of left outer join of Customer stream with Order stream at end of time unit 3?

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