(Solved): What is the direction of the magnetic force on a positive charge that moves as shown in each of the ...

What is the direction of the magnetic force on a positive charge that moves as shown in each of the six cases shown in the image below? (Note: (a) has a $\overrightarrow{\mathbf{F}}$ label by mistake; all green arrows are meant to be velocity. This note will be removed when fixed figure is available from openstax.) (a) $\times \times {\vec{B}}_{\text{in }}$ (c) (e) (b) (d) Case $a:B$ is out of the page, $v$ is down. Case $b:B$ is to the right, $v$ is up. Case $c:B$ is in, $v$ is to the right. Case $d:B$ is to the right, $v$ is to the left. Case e: $B$ is up, $v$ is into the page. Case $f:B$ is to the left, $v$ is out of the page. The direction of force in (a) is (f) direction in $(c)$ is $?$, direction in (d) is , direction in (e) is $?$, and direction in (f) is u.