What is the vertex of the graph of the quadratic function f (x) = x2 - 2x +5 ?

Me what is the value of x? showing work would be appreciated - ! : )

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.