$1.$ The vertical reaction at the hinge support at A$,$ in kN$,$ is

a$.4\mathrm{.}21$

b$.9$

c$.71$

d$.85\mathrm{.}16$

$2.$The horizontal reaction at the hinge support at A$,$ in kN$,$ is

a$.0$

b$.20$

c$.32$

d$.80$

$3.$ The vertical reaction at the rocker support at B$,$ in kN$,$ is

a$.4\mathrm{.}21$

b$.9$

c$.71$

d$.85\mathrm{.}16$

Please show the solutions.