Use the following facts to answer problems $1$ through $3$: Erik and Klaw were inmates sharing a cell in state prison. During their stay, they planned a convenience store robbery for after their release. They decided which store to rob, when they would rob it$,$ and what method they would use. Having frequented the store on many occasions, Erik knew that the store had a safe and that the employees did not have access to its contents. Neither Erik nor Klaw had any experience with breaking into safes and decided to seek help.

Accordingly, they sought out Nitro, a fellow inmate who was a known explosives expert. They requested his assistance and promised to pay him one$-$third of the total recovery. He agreed. However, he would be able only to teach the two how to gain entry to the safe, because he was not scheduled for release until after the day they had planned for the robbery. He added that he owned a house in the area and that it would be available for them to use as a $$hide$-$out until the heat was off.$$

The two were released as planned and drove to the town where the store was located. As instructed by Nitro, the two went to a store and purchased the materials necessary to construct an explosive, which was to be used to gain entry to the safe. That evening, Erik and Klaw went to the convenience store with their homemade explosive. They left the car they were traveling in and went to the rear of the store to gain entry through a back door. However, as they entered the alley behind the store, they encountered a police officer. The officer, suspicious of them, examined their bag and discovered the bomb. Erik and Klaw escaped from the officer and stayed in Nitro's house for $3$ days before being discovered and arrested.

$1.$ What crimes has Erik committed?

$2.$ What crimes has Klaw committed?

$3.$ What crimes has Nitro committed?