The product structure tree of the speaker kit KJ$11$ is shown as follows:

$1)1$ unit KJ$11$ needs $2$ units B and $3$ units C

$2)1$ unit B needs $3$ units D

$3)1$ unit C needs $2$ units D and $2$ units E

$4)1$ unit E needs $1$ unit D

a$)$ Draw the product structure of KJ$11.$

b$)$ The manager of Special Product Company knows that $5$ units and $10$ units of speaker kit KJ$11$ are

required at the beginning of week $7$ and week $8,$ respectively. Projected on$-$hand inventory and lead time of

the speaker kit KJ$11$ and components are given in the following Table.

Item Projected on hand

$($units$)$

Lead time

$($weeks$)$

KJ$1111$

B $52$

C $101$

D $402$

E $31$

The manager knows that $2$ units of B are scheduled to arrive at the beginning of week $2$; $20$ units and $4$ units

of D are scheduled to arrive at the beginning of week $4$ and week $6,$ respectively. Use tables to make MRPs

for speaker kit KJ$11$ and components $($not lot size$).$

b$)$ The manager of Special Product Company knows that $5$ units and $10$ units of speaker kit KJ$11$ are

required at the beginning of week $7$ and week $8,$ respectively. Projected on$-$hand inventory and lead time of

the speaker kit KJ$11$ and components are given in the following Table.

Item Projected on hand

$($units$)$

Lead time

$($weeks$)$

KJ$1111$

B $52$

C $101$

D $402$

E $31$

The manager knows that $2$ units of B are scheduled to arrive at the beginning of week $2$; $20$ units and $4$ units

of D are scheduled to arrive at the beginning of week $4$ and week $6,$ respectively. Use tables to make MRPs

for speaker kit KJ$11$ and components $($not lot size$).$