Question: The prefix and postfix forms of the expression P + ( Q - R ) * * * A B are a + * P

The prefix and postfix forms of the expression P+(Q-R)***AB are
a +*P-QR/AB PQRA-*B/+
b ,PQR-A***B+,+P?**-QRAB
c ,+P?**-QRAB,PQR-A***B+
d ,+P**-QRAB,PQR-AB?**+
e ,PQR-AB?**+,+P**-QRAB
The prefix and postfix forms of the expression P+(Q-R)***AB are a

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