Hey, there! Thanks to Jon for the great reply. :)

Just for future reference here's my post on getting the pinky up to speed.

Being able to get your pinky to do that much work requires that it has enough strength & dexterity. With that in mind, first make sure you are properly warmed up & stretched.

https://www.guitartricks.com/tutorial.php?input=1525

Next, this tutorial to build up your pinky strength & dexterity.

https://www.guitartricks.com/tutorial.php?input=1292

Then, use these trill drills to work on finger independence & control.

https://www.guitartricks.com/tutorial.php?input=1829

After working with these exercises for a while you will be in much better shape to play those parts! I use these exercises regularly to warm up & stay in shape.

Best of success!