Step-by-step explanation:

mode= l+{f¹_f⁰/2f¹-f⁰-f²} ×2

6+1/2(8)-7-4×2

6+(1/5)×2

6+0.4

=6.4

median = l+(n/2 -cf÷f)h

4+(26/2_7÷7)2

4+(13-7÷7)2

4+(6÷7)2

4+1.7142

= 5.7142