Number 1 & 2 you make with the roof tool. The trick is getting the slop direction correct, try with it 45 deg relative to the x,y,z planes.
Number 3, in the skylights there is an eyebrow dormer which is the shape you want.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"