From the complex $\left[Ni{\left(dmg\right)}_2\right]$  
i) charge of ligand  =  $x\left(\text{only mangnitude}\right)$ ii) Co-ordination number of Ni ion = ‘y’
iii) Denticity of ligand  =Z, iv) Total number of ‘5’ membered rings = m
v) Total number of ‘6’ membered  rings = n
Find the value of $\frac{x+y+z}{m+n}$ (Rounding to nearest integer)