Which of the following assumptions would cause the constant growth stock valuation model to be invasid? a. The growth rate is ziero. b. The growth rate is negative. c. The required rate of return is greater than the growth rate. d. The required rate of return is more than 50%. e. None of the above assumptions would invalidate the model. Quantitative Problem 1: Hubbard industries just paid a common dividend, D9, of \$1.20. It expects to grow at a constant rate of 3% per year If investors require a 10% return on equity, what is the current price of Hubbards common stock? Do not round intermediate calculations. Round your snewer to the nestent ctent. s pershare