\(L=4080\left(\overset{o}{A}\right)\)
\(\Rightarrow N=\dfrac{2L}{3,4}=2400\left(nu\right)\)
\(\Rightarrow A_1=40\%\dfrac{N}{2}=480\left(nu\right)\)
\(\Rightarrow A_2=\dfrac{1}{2}.A_1=240\left(nu\right)\)
\(\Rightarrow A=T=A_1+A_2=720\left(nu\right)\)
\(\Rightarrow G=X=\dfrac{N}{2}-A=480\left(nu\right)\)
\(H=2A+3G=2880(lk)\)