4.
设\(a\),\(b\),\(c\)是三条不同直线,\(\alpha \),\(\beta \),\(\gamma \)是三个不同平面,给出下列命题:
\(①\)若\(\alpha \bot \gamma \),\(\beta \bot \gamma \),则\(\alpha /\!/\beta \);
\(②\)若\(a\),\(b\)异面,\(a\subset \alpha \),\(b\subset \beta \),\(a/\!/\beta \),\(b/\!/\alpha \),则\(\alpha /\!/\beta \);
\(③\)若\(\alpha \bigcap \beta =a\),\(\beta \bigcap \gamma =b\),\(\gamma \bigcap \alpha =c\),且\(a/\!/b\),则\(c/\!/\beta \);
\(④\)若\(a\),\(b\)为异面直线,\(a/\!/\alpha \),\(b/\!/\alpha \),\(c\bot a\),\(c\bot b\),则\(c\bot \alpha \).
其中正确的命题是_____\(.\)_________________