Answer:

17/4

Explanation:

R1 =2+2+2=6 (series)

1/ R2=1/6+1/6=2/6=1/3 (parallel)

R2=3

now

R3=3+3+3=9 (series)

1/R4=1/9+1/9=2/9 parallel

R4=9/2

Rfinal=9/2+2+2=9/2+4=17/2. series