$1$ Springs

A $25\mathrm{.}0$ cm spring stands vertically on the ground, with its lower end secured in a base. A $1\mathrm{.}5$ Kg brick is held $40$ cm directly above the spring and dropped onto the spring. The spring compresses to a length of $17\mathrm{.}0$ cm before starting to launch the brick back upward.

Problem $1\mathrm{.}1.$ Draw a pictorial diagram describing the brick and the spring system. Problem $1\mathrm{.}2.$ What is the change in kinetic energy between the moment when the brick is dropped and the moment the spring stops compressing? Problem $1\mathrm{.}3.$ What is the work done by the force of gravity?Problem $1\mathrm{.}4.$ What is the work done by the spring? Problem $1\mathrm{.}5.$ What is the spring$$s spring constant?