please provide the formula you used and step by step of solving the problems

1) Williams Inc. has a current ratio equal to 3, a quick ratio equal to 1.8, and total current assets of $6 million. Williams' inventory balance is

A) $2,000,000.

B) $2,400,000.

C) $4,000,000.

D) $4,800,000.

2) Given an accounts receivable turnover of 10 and annual credit sales of $900,000, the average collection period is

A) 18.25 days.

B) 36.50 days.

C) 90 days.

D) 40.56 days.

3) Spagler Corporation had retained earnings as of 12/31/16 of $15MM. During 2017, Spagler's net income was $7MM. The retained earnings balance at the end of 2017 was equal to $20MM. Therefore,

Spagler paid a $2MM dividend during the year.

Spagler paid a $5MM dividend during the year.

Spagler sold $5MM in common stock during the year.

Spagler purchased $2MM in treasury stock during the year.