In `Al_(2)Cl_(6)` the number of covalent and coordinate bonds are

If in I_(2)Cl_(6) the number of covalent bonds and coordinate bonds are m and n respectively. Find the sum of m+n

The number of covalent bonds in ethylene is

In [Co(NH_(3))_(6)]Cl_(3) ,the number of covalent bonds is

The number of covalent bonds formed by beryllium is