q*b**opt*(*P**3*) will be small if |*P*3(j*w*)| is large around the
frequency of *w**=1* (the modulus of the right-half plane
zero).

q For zeros with the same modulus, *b**opt*(*P**3*) will be smaller for a
plant with relatively larger real part zeros than for a plant with relatively larger imaginary part
zeros (i.e., a pair of real right-half plane zeros has a much worse effect on the
performance than a pair of almost pure imaginary axis right-half
plane zeros of the same modulus).