Question

I need help in number 3

Answer 1

$\text{Craig} = 12\\ \text{Maria} = 2\cdot\text{Craig}=2\cdot12\\ \text{Maria} = \text{Nelson}-5 \Rightarrow \text{Nelson}=\text{Maria}+5=\boxed{2\cdot12+5}\Rightarrow A$