Please do these 2 questions

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

If you could answer these your a life saver

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?