An engineer is asked by a non-engineering friend to review their design for a new mechanical ball deployer for their loc

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An engineer is asked by a non-engineering friend to review their
design for a new mechanical ball deployer for their local sports
club. The friend has agreed to design the mechanical device for the
club at a low cost, and just wants to know that they haven't made
any stupid errors in making the design. The engineer checks the
design and makes sure it is safe, and encourages the friend to go
ahead with the work. Which of the following violations of the act
might the engineer be guilty of?
a. None - they are not directly involved in the design work
b. 72.2.a
c. 72.2.m
d. 72.2.g