question 4 12 points format remember moebius does not check your metho

Question

Question 4: (12 points)
Format:
• Remember: Möbius does not check your method, and matrix
computations are fiddly. Make sure to check your answers carefully
before submitting.
. If your answer is a vector, enter it as a column vector using the
vector/matrix palette tool.
a. Showhide
Find d such that det A-0, where
A=0d -1
30 10
d=
b. Showhide
Now, and for the remainder of this question, instead set d = 12, so
4 3 13 Y
A=0 12
30 10,
Calculate the matrix of cofactors for the matrix A.
matrix of cofactors
c. Showhide
Use the information above to find the inverse matrix A-¹,
employing the method of cofactors. (This part still uses that d - 12
)
A-1 =
d. Showhide
Use your answer from the previous part to solve the matrix equation
4 3 131
90-0
0 12
30
10
need full solution with final answer on the box
POF