Final answer:
The sentences contain errors that need to be corrected.
Step-by-step explanation:
The single error in sentence 51.1 is the word 'make' which should be 'made'. The corrected sentence is: Meghan Markle met students to discuss the challenges facing young women and has made a surprise visit to the University of Johannesburg during her royal tour of Africa.
In sentence 512, the word 'speak' should be 'spoke'. The corrected sentence is: Together they spoke about the challenges faced by young women in accessing higher education.
In sentence 513, the word 'women' should be 'woman' and 'communty' should be 'community'. The corrected sentence is: When a woman is empowered, it changes absolutely everything in the community.'
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