The talk show host's speech consists of four paragraphs. Tick the number of the paragraph where you find an answer to each question.

V=(6t-t^3/8)’=6-3/8*t^2=0; -3/8*t^2=-6 => t=4 c
х1=6*2-2^3/8=11
x2=6*6-6^3/8=9
x3=6*4-4^3/8=16
vср= ((x3-x2)+(x3-x1))/(t2-t1)=((16-9)+(16-11))/4= 3 м/с