$4.$ TreatLand currently has $400,000$ shares of stock outstanding that sell for $$90$ per share. Assuming no market imperfections or tax effects exist, what will the share price be after:

a$.$ TreatLand has a five$-$for$-$three stock split?

b$.$ TreatLand has a $15\%$ stock dividend?

c$.$ TreatLand has a four$-$for$-$seven reverse stock split?

d$.$ Determine the new number of shares in parts a through c$.$