Equilibrium · Basic buffer solution pH

Consider a weak base ‘B' of $\mathrm{p}K_\mathrm{b} = 5.699$. ‘x' mL of 0.02 M HCl and ‘y' mL of 0.02 M weak base ‘B' are mixed to make 100 mL of a buffer of pH 9 at 25$^\circ$C. The values of ‘x' and ‘y' respectively are:

[Given: $\log 2 = 0.3010$, $\log 3 = 0.4771$, $\log 5 = 0.699$]