The answer is 91& b1 N0 L% `* N% I; H+ p
1 row 3x4+1x3=15. d0 K" A' k& b6 Q2 [
2 row 4x5+2x4=28tvb now,tvbnow,bttvb( x5 W; m2 N, U/ I5 S
3 row 5x6+3x5=45
7 _( d; S- U. G/ t& I5.39.217.77:88984 row 6x7+4x6=66
" r" H- @4 W$ x. y/ d+ B# u( h, ctvb now,tvbnow,bttvb5 row 7x8+5x7=91  |