如图,△ABC中,∠ABC与∠ACB的平分线交于点I,根据下列条件,求∠BIC的度数.
(1)若∠ABC=60°,∠ACB=70°,则∠BIC=______;
(2)若∠ABC+∠ACB=130°,则∠BIC=______;
(3)若∠A=50°,则∠BIC=______;
(4)若∠A=110°则∠BIC=______;
(5)从上述计算中,我们能发现已知∠A,求∠BIC的公式是:∠BIC=______;
(6)如图,若BP,CP分别是∠ABC与∠ACB的外角平分线,交于点P,若已知∠A,则求∠BPC的公式是:∠BPC=______.