Answer and Explanation:
The computation is shown below:
a. For current ratio 
Current ratio = Current assets ÷ current liabilities
Before that first determine the current assets 
As we know that
Net working capital = Current asset - Current liability 
 $3,640 = Current asset - $5,430 
 So, 
Current asset is 
= $3,640 + $5,430 
= $9,070 
Now the current ratio is 
= $9,070 ÷ $5,430 
= 1.67 times 
b. The quick ratio is 
Quick ratio = (Current asset - Inventory) ÷ Current liability 
 = ($9,070 - $4,290)÷ $5,430 
= $4,780 ÷ $5,430 
= 0.88 times