Create MATLAB code to generate and plot three different mathematical functions on the same graph within the range $[3,3].$ Plot these curves using different line styles and colors. Include appropriate labels for the axes, a title for the plot, and a legend that distinguishes between the three curves.

Functions to plot:

$1.$ f$($x$)=$sin$($x$)$

$2.$ g$($x$)=$cos$($x$)$

$3.$ h$($x$)=$sin$($x$)+$cos$($x$)$

Your MATLAB code should:

Generate an array of x values using linspace.

Calculate the corresponding y values for each function.

Plot these functions on the same graph using different line styles and colors.

Include labels for the x and y axes, a title for the plot, and a legend to differentiate between the three curves.

Please write the MATLAB code that accomplishes this task.