Simplify the function ๐’‡(๐’‚,๐’ƒ,๐’„,๐’…)=โˆ‘๐…๐‘ด(๐ŸŽ,๐Ÿ’,๐Ÿ“,๐Ÿ•,๐Ÿ–,๐Ÿ—,๐Ÿ๐Ÿ,๐Ÿ๐Ÿ,๐Ÿ๐Ÿ‘,๐Ÿ๐Ÿ“) Using Karnaugh map

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ะŸะพะบะฐะทะฐั‚ัŒ ะพะฟะธัะฐะฝะธะต
๐’‡(๐’‚,๐’ƒ,๐’„,๐’…)=โˆ‘๐…๐‘ด(๐ŸŽ,๐Ÿ’,๐Ÿ“,๐Ÿ•,๐Ÿ–,๐Ÿ—,๐Ÿ๐Ÿ,๐Ÿ๐Ÿ,๐Ÿ๐Ÿ‘,๐Ÿ๐Ÿ“)
ะ ะตะบะพะผะตะฝะดะฐั†ะธะธ ะฟะพ ั‚ะตะผะต
ะšะพะผะผะตะฝั‚ะฐั€ะธะธ
ะะฒั‚ะพั€

Would there not be another quad? (b' + c)? Can someone explain?

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