diff --git a/praktikum-4/demultiplexer_1to8_khalilaindana.circ b/praktikum-4/demultiplexer_1to8_khalilaindana.circ
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index 0000000..d2ec61c
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diff --git a/praktikum-4/gabungan_mux_demux_8bit_kalilaindana.circ b/praktikum-4/gabungan_mux_demux_8bit_kalilaindana.circ
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index 0000000..3eed4ac
--- /dev/null
+++ b/praktikum-4/gabungan_mux_demux_8bit_kalilaindana.circ
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+ This file is intended to be loaded by Logisim-evolution v3.9.0(https://github.com/logisim-evolution/).
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diff --git a/praktikum-4/multiplexer_8to1_khalilaindana.circ b/praktikum-4/multiplexer_8to1_khalilaindana.circ
new file mode 100644
index 0000000..408fee1
--- /dev/null
+++ b/praktikum-4/multiplexer_8to1_khalilaindana.circ
@@ -0,0 +1,244 @@
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+ This file is intended to be loaded by Logisim-evolution v3.9.0(https://github.com/logisim-evolution/).
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diff --git a/praktikum-4/pds_LAPRAK4KALILA (1).pdf b/praktikum-4/pds_LAPRAK4KALILA (1).pdf
new file mode 100644
index 0000000..c207bbe
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