5.
在直角坐标系\(xOy\)中,直线\(l\)的参数方程为\(\left\{ \begin{array}{*{35}{l}} x=3-t, \\ y=1+t, \\ \end{array}(t \right.\)为参数\().\)在以坐标原点为极点,\(x\)轴正半轴为极轴的极坐标系中,曲线\(C:ρ=2 \sqrt{2}\cos \left(θ- \dfrac{π}{4}\right) \)
\((\)Ⅰ\()\)求直线\(l\)的普通方程和曲线\(C\)的直角坐标方程\(;\)
\((\)Ⅱ\()\)求曲线\(C\)上的点到直线\(l\)的距离的最大值.