Step 1: Understanding the maxterms.
A maxterm corresponds to the OR of all variables, where each variable is complemented if its value is 0 in the truth table.
For the function \( Y = ab + a'c \), the corresponding maxterms are:
\[
M_0, M_3, M_5, M_7
\]
Final Answer:
\[
\boxed{(1) \, M_0, M_3, M_5, M_7}
\]