 
<translate> Tambayar wucewa: A ranar 10 ga Fabrairun 1972, Ras al-Khaimah, a karkashin jagorancin Sheikh Saqr bin Mohammad al-Qasimi, ya shiga Hadaddiyar Daular Larabawa.  Tambaya: Bisa ga wannan nassi, yaushe Ras al Khaima ya shiga cikin masarautar? <eng> The question Passage: On 10 February 1972, Ras al-Khaimah, under the leadership of Sheikh Saqr bin Mohammad al-Qasimi, joined the United Arab Emirates.

Question: Based on this passage, when did ras al khaima join the emirates? 