The below structure shows a seesaw. Seats in this structure are close to the ground.

What is the value of shear force RIGHT BEFORE point B in kN$.$m according to the sign convention?

$P1=3\mathrm{.}3kN$

$P2=2\mathrm{.}1kN$

$L1=1\mathrm{.}4m$

$L2=5\mathrm{.}6m$

Key in the result to ONE Decimal Place. For example, $1\mathrm{.}2$ and not $1$ or $1\mathrm{.}21$

Enter the numeric value without unit. For example, $1\mathrm{.}2$ and not $1\mathrm{.}2kN$