The line passing through the points (5,1...

The line passing through the points `(5,1,a)` and `(3,b,1)` crosses the yz-plane at the point `(0,17/2,(-13)/2)`.Then

`a=2,b=8`

`a=4,b=6`

`a=6,b=4`

`a=8,b=2`

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