Two different analyses were conducted on a water sample from Wadi Dhaiqah Reservoir. The first analysis was to evaluate ions concentration $($Table $1\mathrm{.}1).$ The second analysis was gravimetric $($solids$)$ test $($Table $1\mathrm{.}2).$ Determine the following:

Compute the activity of each ion.

Determine the total solids $($including fixed and volatile parts$),$ total suspended solids $($including fixed and volatile parts$),$ and total dissolved solids $($including fixed and volatile parts$).$

Table $1\mathrm{.}1$: Ion analysis