What is a playwright?

What color does sam obtain when he mixes white with a color? sam is painting a landscape and needs to paint the sky light blue. he mixes blue and white to obtain this color. light blue is a of the color blue, which he obtains by mixing white.

Need some ! asap i need to figure out 3 major changes in bridges over time and why these changes to adapt to both improvements in technology and changing social links would also alot.

The "untying of the plot" or the resolution of the play is the?