A box experiences a varying net force that changes its velocity. The graph shows the velocity of the box as a function of time. Which of the following correctly describes the net work, $W_{\text{n}\text{e}\text{t}},$ done on the box for the given intervals of time? $($A$)\backslash$table$[[$Between $0$ and $t_1,$Between $t_1$ and $t_2,$Between $t_2$ and $t_3$