A square footing $2\mathrm{.}2$x$2\mathrm{.}2$m is located at the depth of $1\mathrm{.}8$m below ground layer in sandy soil. Calculate the safe bearing capacity and safe load footing can take under following cases:

Loose sand with Y $=16$kN $/($m $^2)$ phi $=20$ deg

Dense sand with r $=21$kN $/($m $^3)$ Phi $=35$ deg

What type of shear failure is expected in each case and why? Bearing capacity factors may be assumed as below: