The position of a point in time \('t'\) is given by \(x=a+bt-ct^2, y=at+bt^2\). Is acceleration at time \('t'\) is

\(t-c\) \(t+c\) \(2t-2c\) \(2\sqrt{t^2+c^2}\)

\(2\sqrt{t^2+c^2}\)

Use derivatives