Deficiency question

https://dutch-passion.com/en/blog/a-visual-guide-to-cannabis-deficiencies-n987

https://www.royalqueenseeds.com/blog-how-do-you-prevent-and-treat-nutrient-lockout-in-cannabis-n665

https://www.growweedeasy.com/cannabis-plant-problems/nitrogen-deficiency

Nitrogen looks like first half flower should be 1/2 veg nut and 1/2 bloom also Google nutrient lockout

Potassium deficiency.

Well, your diary doesn't give us any information, does it... are you growing in soil? Coco? Hydroponic? It's probably a magnesium deficiency - check your PH... if you're growing in soil, it should be between 6.2 and 6.5 ... preferrably 6.2. And add a dose of calmag to your nutes but only once a week... Good luck.