Answer:
Tension maximum =1131.9 N 
Tension minimum =868.28 N 
Tension at 3/4= 1065.995 N
Step-by-step explanation:
a)
Given Mass of wrecking ball M1=88.6 Kg 
 
Mass of the chain M2=26.9 Kg 
 
Maximum Tension Tension max=(M1+M2) × (9.8 m/s²) 
 
=(88.6+26.9) × (9.8 m/s²) 
 
=115.5 × 9.8 m/s² 
 
Tension maximum =1131.9 N 
 b)
Minimum Tension Tension minimum=Mass of the wrecking ball only × 9.8 m/s²
 
=88.6 × 9.8 m/s²
 
Tension minimum =868.28 N 
 
c)
Tension at 3/4 from the bottom of the chain =In this part you have to use 75% of the chain so you have to take 3/4 of 26.9 
 
= (3/4 × 26.9)+88.9) × 9.8 m/s²
 
= (20.175+88.6) × 9.8 m/s² 
 
=(108.775) × 9.8 m/s² 
 
=1065.995 N