ආලෝකය යටතේ 16, 17, 18, 19, 20 හා 21 යන Practicals සඳහා 100%ක්ම සම්පූර්ණ කරන ලද සටහන් (විශේෂ කරුණුද සමඟ) මෙහි අන්තර්ගත වේ.
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