Can I write a 5000-word article in a day?

Can I write a 5000-word article and edit 2, 1000-word articles in a day?

Can I write a 5000-word article, edit 2, 1000-word articles and design a 1-hour learning program in a day?

Can I write a 5000-word article, edit 2, 1000-word articles, design a 1-hour learning program and Ideate a new assessment system in a day?

Can I write a 5000-word article, edit 2, 1000-word articles, design a deep-learning program, Ideate a new assessment system, write a new poem, and compose a new song, in a day?

Can I write a 5000-word article, edit 2, 1000-word articles, design a deep-learning program, Ideate a new assessment system, write a new poem, compose a new song, and cook a full meal for the family in a day?

Can I write a 5000-word article, edit 2, 1000-word articles, design a deep-learning program, write a new poem, compose a new song, cook a full meal for the family, and walk 5 kilometres in a day?

Can I do it living in my house with my family, and helping with regular chores?

Can I do it for 7 days at a stretch? A month? A year?

That is approximately how I have been building efficiency, testing proficiency, and finding the limits of performance.