Given a regular language l, let l'= {x | there exist y = a1 a2 .. an in l, x = a2 a4.. show that l' is regular.

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Cprogram to find //perimeter of rectangle printf(" \n perimeter of rectangle \n"); printf(""); printf("\n enter width and length of the rectangle : "); scanf("%f%f", & width,& length); perimeter = 2 * (width + length); printf("perimeter of rectangle is: %.3f", perimeter);