Multisim and Ultiboard

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water level indicator with LED and Buzzer

Good day.

In real case, i should have 7 LED. Due to there are no enough place , i just connect 3 LED in mutlisim

I thought my LED should be connected in parallel, but when i construct them in breadboard, it look like they are connected in series; 1st LED is the lightest and the last one is dark(almost cannot light up)

Furthermore,my last LED is connected to buzzer, which means that when my last led light up,my buzzer also will sound. However, the volume of buzzer is very low. 

Is there any suggestions to solve this?

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