A Force Of $30 \mathrm {~N}$ Is Required to Maintain a Spring Stretched from Its Natural

A force of $30 \mathrm {~N}$ is required to maintain a spring stretched from its natural length of $12 \mathrm {~cm}$ to a length of $15 \mathrm {~cm}$ . How much work is done in stretching the spring from $12 \mathrm {~cm}$ to $26 \mathrm {~cm}$ ?

A) $10.80 \mathrm {~J}$
B) $14.00 \mathrm {~J}$
C) $12.00 \mathrm {~J}$
D) $9.80 \mathrm {~J}$
E) $13.00 \mathrm {~J}$