01.) Show the truth table for a 4-input priority encoder in which S₀ has the highest priority, S₁ has a higher priority than S₂, S₃ has the lowest priority, and V is equal to 1 when all inputs (S₀ - S₃) are zero.

My guess ... ( I would prefer S3 to be on the left )

S0	S1	S2	S3	V	A1	A0
0	0	0	0	1	x	x
0	0	0	1	0	0	0
0	0	1	x	0	0	1
0	1	x	x	0	1	0
1	x	x	x	0	1	1

2. Use logic gates to implement the encoder circuit.

(Need to know of table is right before I start building circuit)