tolong jawab kak beserta caranya no 28

Serikan C1, C2, C3
[tex]\frac{1}{C_{123}}=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}\\ \\\frac{1}{C_{123}}=\frac{1}{30}+\frac{1}{15}+\frac{1}{10}\\ \\\frac{1}{C_{123}}=\frac{1+2+3}{30}\\ \\\frac{1}{C_{123}}=\frac{6}{30}\\ \\C_{123}=5\mu F[/tex]

Serikan C4, C5
[tex]\frac{1}{C_{45}}=\frac{1}{C_4}+\frac{1}{C_5}\\ \\\frac{1}{C_{45}}=\frac{1}{30}+\frac{1}{15}\\ \\\frac{1}{C_{45}}=\frac{1+2}{30}\\ \\\frac{1}{C_{45}}=\frac{3}{30}\\ \\C_{45}=10\mu F[/tex]

Paralelkan C123 dengan C45
C total = 5 + 10 = 15μF