Please explain how to draw on Solidworks step by step $($it would be great if you could help me understand with pictures$)$PROBLEM $10$: Loft$/$sweep

Directions: Create the part shown below. To avoid sharp transitions, you may have to select "keep normal constant" under "options" when performing the sweep. Usual DRAWN BY and WEIGHT, set material to copper.

$A=250$;$B=75$;$C=25$;$D=10$;$E=50$;$F=50$; duct wall thickness $=5$

$2$ X RC shown below represents a fillet with radius C at each bend in the pipe.

Requirements: same as PKUBLEM $6.$