If m<3=75 degrees, what is m<4?

To find the measure of angle <4, we need some additional information. The given information only tells us the measure of angle <3, which is 75 degrees. However, we need to know the relationship between angle <3 and angle <4 in order to find the measure of angle <4.

Please provide any additional information or equations that relate angle <3 and angle <4.