$1.$ Create a function called std$\_$line.m that takes as input A coefficient of x$,$ B coefficient of y and constant C in the standard form of the equation of a line Ax$+$By$=$C and produces the output of slope and yintercept value. Write comment information to help the user.

$2.$ Create a function called ptm$\_$line.m that takes as input a point, indentified as $($x$1,$ y$1),$ and the slope m in the point slope form of the equation of a line $($y$-$y$1)=$m$($x$-$x$1)$ and produces the output of yintercept value.

$3.$ Create a script called LinEq.m and use functions mb$\_$line, Std$\_$line, and ptm$\_$line to do the following:

$($a$)$ provide a user menu to pick from $3$ choices of forms of linear equation and exit

$*($b$)$ use a flow control mechanism to allow user to continuously pick and plot multiple linear equations

$*($c$)$ present the menu and capture a choice

$($d$)$ use the if construct to get parameters from the user according to the selected choice

$($e$)$ calculate slop $($if necessary$)$ and yintercept using function associated with the selection

$($f$)$ make sure to include both an exit from the if construct and report an error condition when appropriate

$($g$)$ define the domain and range values and create a plot

$($h$)$ use the switch construct to define the title for the each plot according to the form of the equation

$($i$)$ for standard form equation:

$($i$1)$ create an x axis label with slope and yintercept values

$($i$2)$ display a green $*$ on the yintercept location

$($j$)$ for point slope form equation:

$($j$1)$ create an x axis label and display the yintercept value

$($j$2)$ display a green $*$ on the yintercept location

$($j$3)$ display a red $+$ on the point entered by the user

$($k$)$ for slope intercept form equation:

$($k$1)$ no x axis label is required

$($k$2)$ display a green $*$ on the yintercept location

$($k$3)$ display a red $+$ on each point entered by the user

$($m$)$ save each plot created with a unique filename

$($n$)$ check for error conditions and deal with them gracefully