SHOW YOUR COMPLETE WORK$)$ A company has designed a fuel$-$efficient generator. It took

the company $63$ hours to produce the first unit. If the company uses an $80\%$ learning rate for this task,

how long should it take the company to produce

a$.$ the $6$th unit? $[3$ points$]$

b$.$ the $15$ th unit? $[3$ points$]$

c$.$ the $45$th unit? $[3$ points$]$

d$.$ the first $6$ units? $[3$ points$]$

e$.$ the first $15$ units? $[3$ points$]$

f$.$ the first $45$ units? $[3$ points$]$

g$.$ the units $7$th through $15$ th

$?[6$ points$]$

h$.$ the units $16$th through $45$ th

$?$