A block hangs from ring $\text{'}$A$\text{'}.$ Ring $\text{'}$A$\text{'}$ is supported by a spring C $\text{'}$A$\text{'}$ with stiffness k subscript $\text{'}$A$\text{'}$ C of $1\mathrm{.}5$ kilonewtons per meter and by a spring B $\text{'}$A$\text{'}$ with stiffness k subscript $\text{'}$A$\text{'}$ B of $1\mathrm{.}2$ kilonewtons per meter. Ends C and B of the springs are attached to a horizontal ceiling. Ring $\text{'}$A$\text{'}$ is $0\mathrm{.}6$ meters to the right of point C$,0\mathrm{.}4$ meters to the left of point B$,$ and $0\mathrm{.}5$ meters below points B and C$.$ If the block is $25$ kg$,$ determine the unstretched length of spring AB after the block is removed.