(1) What is the smallest 9-digit prime of the form: axyzbzyxc, where xyz and zyx are each 3-digit primes with distinct digits; and each letter a,b,c,x,y,z designates a different digit.

(2) Also find the largest.

(3) Now, same question for an 11-digit prime of the form awxyzbzyxwc; again different letters are distinct digits, where wxyz and zyxw are a pair of 4-digit emirps.

(4) Also find the largest.

Note: Emirps are primes whose reversal is a different prime.