2) 4×8 <=35 <br> 4×7 <=35<br>5×8 <=40<br>5×7 <=40<br>6×9 <=54<br>6×8 <=54<br>7×5 <=39<br>7×4 <=39<br>9×5<=52<br>9×4 <=52<br>8×7 <=60<br>8×6 <=60<br>нельзя увеличить множитель
3) 3×8 <=25<br>2×5 <=11<br>4×7 <=31<br>4×9 <=36<br>6×7 <= 43<br>8×5 <= 44<br>5×7 <= 39<br>7×9 <= 63<br>9×3 <= 30