$15$ points.

Input data:

Derrick Height: $140$ ft

Type of Drilling: #$1$

Design factor: $4$

Calculate the following:

a$)$ Determine the Ton$-$Mile Service life of drilling line for the first and the subsequent cuts.

b$)$ Determine the recommended cut$-$off length for the drilling line.

c$)$ Recommend a slip& cut program for this rig $($assuming $4$ slips before cut$).$