5.
\((1)\)函数\(f(x)={a}^{x-2015}+2017 (a > 0\)且\(a\neq 1)\)所过的定点坐标为__________.
\((2)\)如图,在三棱锥\(P-ABC\)中,\(PA⊥\)平面\(ABC\),\(AB⊥BC\),\(PA=AB=1\),\(BC=\sqrt{3} \)则三棱锥\(P-ABC\)外接球的表面积为__________.
\((3)\)直线\(ax+(a-1)y+1=0\)与直线\(4x+ay-2=0\)互相平行,则实数\(a=\)________.
\((4)\)若变量\(x\),\(y\)满足约束条件\(\begin{cases}x\leqslant 1 \\ x+y\geqslant 0 \\ 3x-2y+5\geqslant 0\end{cases} \),\(z=2x-y\),则\(z\)的最小值为_______.