Find the equivalent resistance between points A and B shown inthe figure(_Figure

Find the equivalent resistance between points A and B shown inthe figure(_Figure 1_) . Consider /R/1 = 4.5? /R/2 = 2.1? /R/3= 3.7? /R/4 = 4.6? /R/5 = 6.9? and /R/6 = 8.1?