如图,\(\triangle ABC\)中,\(∠ABC\)的角平分线与\(∠ACB\)的外角\(∠ACD\)的平分线交于\(A_{1}\).
\((1)\)当\(∠A\)为\(70^{\circ}\)时,
\(∵∠ACD-∠ABD=∠\) ______
\(∴∠ACD-∠ABD=\) ______ \({\,\!}^{\circ}\)
\(∵BA_{1}\)、\(CA_{1}\)是\(∠ABC\)的角平分线与\(∠ACB\)的外角\(∠ACD\)的平分线
\(∴∠A_{1}CD-∠A_{1}BD= \dfrac {1}{2}(∠ACD-∠ABD)\)
\(∴∠A_{1}=\) ______ \({\,\!}^{\circ}\);
\((2)∠A_{1}BC\)的角平分线与\(∠A_{1}CD\)的角平分线交于\(A_{2}\),\(∠A_{2}BC\)与\(A_{2}CD\)的平分线交于\(A_{3}\),如此继续下去可得\(A_{4}\)、\(…\)、\(A_{n}\),请写出\(∠A\)与\(∠A_{n}\)的数量关系 ______ ;
\((3)\)如图\(2\),四边形\(ABCD\)中,\(∠F\)为\(∠ABC\)的角平分线及外角\(∠DCE\)的平分线所在的直线构成的角,若\(∠A+∠D=230\)度,则\(∠F=\) ______ .
\((4)\)如图\(3\),若\(E\)为\(BA\)延长线上一动点,连\(EC\),\(∠AEC\)与\(∠ACE\)的角平分线交于\(Q\),当\(E\)滑动时有下面两个结论:\(①∠Q+∠A_{1}\)的值为定值;\(②∠Q-∠A_{1}\)的值为定值\(.\)其中有且只有一个是正确的,请写出正确的结论,并求出其值.