Lindsay Corporation had net income for 2011 of $3,000,000. Additional information is as follows: Depreciation of plant assets $1,200,000 Amortization of intangibles 240,000 Increase in accounts receivable 420,000 Increase in accounts payable 540,000 Lindsay's net cash provided by operating activities for 2011 was a. $4,440,000. b. $4,560,000. c. $4,320,000. d. $1,680,000