Hi :), im really struggling with this. Just wanted to know if anyone can explain step by step for me please?

Answer:
314 m²
Step-by-step explanation:
the surface area of a sphere (As) = 4×pi×r²
our radius r (half the diameter) here is 5m.
=>
As = 4×pi×5² = 4×3.14×25 = 100×3.14 = 314 m²