Answer
Please see the work below.
Work Step by Step
(a) We know that
$Q=mc\Delta T$
We plug in the known values to obtain:
$Q=(3.4)(447)(130-20)$
$Q=167,000J$
(b)
We plug in the known values to obtain:
$t=\frac{Q}{P}$
$t=\frac{167,000}{2000}$
$t=84 s$