The questions solution is given as
This is further explained below.
Generally, the equation for equilibrium is mathematically given as
Qd=Qs
Therefore
P=90-2P
Q*=2*30
Q=60
b)
Price floor=$10
Quantity demanded
DQ= 30-10
DQ=20
Quantity Supplied
QS= 2*10
QS=20
Surplus
S=20-20
S=0
c) Generally, the equation for Consumer surplus is mathematically given as
CS=0.5(120-45)(75)
CS=$2812.5
Producer surplus
PS=(45-37.5)(75)+0.5(75)(37.5)
PS=$1968.75
Deadweight loss
DL=0.5(45-37.5)(80-75)
DL=$18.75
Total surplus
TS= PS+CS-DWL
TS=$4762.5
d) Generally, the equation for Consumer surplus is mathematically given as
CS=(70-25)*50+0.5(120-70)*50
CS=$3500
PS=0.5(50)(25)
PS=$625
DL=0.5(80-50)(70-25)
DL=$675
TS= $3450
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