A $4\mathrm{.}0$ kg mass is placed at the end of spring A which is suspended vertically and it stretches $0\mathrm{.}7$ m

relative to its original length. A $7\mathrm{.}0$ kg mass is placed at end of spring B which is also suspended

vertically and it stretches $0\mathrm{.}4$ m relative to its original length. The two spring$/$mass systems are then

vertically displaced and set in motion. Which of the following statements is true?