#### Answer

a) $1.75X$
b) $1.3X$

#### Work Step by Step

a). For a person with near point at 25cm,
$m=1+\frac{25}{f}$
$P=\frac{1}{f}$
or, $f=\frac{1}{P}=\frac{1}{3}=0.33m=33.3cm$
$m=1+\frac{25}{33.3}=1.75X$
b). For a person with near point at 10cm,
$m=1+\frac{10}{f}=1+\frac{10}{33.3}=1.3X$