Please help. where do i start

(3.33) Automated manufacturing operations are quite precise but still vary, often with distributions that are close to Normal. The width in inches of slots cut by a milling machine follows approximately theN(0.8750,0.001)

N

(

0.8750

,

0.001

)

distribution. The specifications allow slot widths between 0.8725 and 0.8775 inch.

What proportion (

0.001) of slots meet these specifications (use software)?