Below is Part A$\text{'}$s product structure with lead times in daysa$)$ What is the minimum planning horizon for part A$?$b$)$ If the lead time for part G is reduced by $50\%,$ would that result in any changes to the minimum planning horizon? If so$,$ what would be the change?LT $=5$LT $=5$ELT $=3$LT $=5$DLT $=10$GLT $=18$LT $=10$LT $=12$LT $=12$LT $=5$LLT$=5$LT $=12510$C$\backslash$or