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[[File:SysTUT3 SysTUT6 22.png|thumb|750px|The frequency response of the second-order Butterworth loswpass filter.]]
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In this part of the tutorial lesson, create three more S-domain transfer function blocks and cascaded them as shown in the figure below. Copy and paste the additional parts since you want them to have the same properties as part A1.
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[[File:SysTUT3 8.png|thumb|660px| The schematic of the cascaded lowpass filter using transfer function virtual blocks.]]
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<p> </p>
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