$1)\cos(\widehat{A})=\dfrac{b^2+c^2-a^2}{2bc}=0,65\\ \Rightarrow \widehat{A} \approx 49,46^o\\ \cos(\widehat{B})=\dfrac{a^2+c^2-b^2}{2ac}=0,51875\\ \Rightarrow \widehat{B} \approx 58,75^o\\ \Rightarrow \widehat{C}=71,79^o\\ \Rightarrow A\\ 2)bc=4S=4.\dfrac{1}{2}bc\sin(\widehat{A})\\ \Rightarrow\sin(\widehat{A})=\dfrac{1}{2}\\ \Rightarrow\sin(\widehat{A})=30^o\\ \Rightarrow A$