In a double$-$slit experiment, normally incident parallel plane waves of red light $(800$nm$)$ and blue light$(400$nm$)$ are both used to illustrate the slits.

A$)$ List the y positions of the first $3$ red maxima above y$=0,$ not counting y$=0$ maxima in units of mm$.$

B$)$ List the first two orders where the bright peak for blue coincides with the bright peak for red, not counting the y$=0$ maxima