Current Attempt in Progress

Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is $122$ km long, $35\mathrm{.}7$ km wide, and $177$ m thick. $($a$)$ How much heat in joules would be required to melt this iceberg $($assumed to be at $0C)$ into liquid water at $0C?$ The density of ice is $917k\frac{g}{m^3}.($b$)$ The annual energy consumption by the United States in $1994$ was $9\mathrm{.}3{10}^{19}J.$ If this energy were delivered to the iceberg every year, how many years would it take before the ice melted?

$($a$)$ Number $$ Units

$($b$)$ Number $$ Units