Use the following information for all questions:

Assume your firm, with $15\%$ WACC, is consider the following project with following timeline $($if they are mutually exclusive$)$:

$\backslash$table$[[,0,1,2,3,4,5,],[$Project A$,-$$$6,000,$$$1,000,$$$1,000,$$$4,000,$$$4,000,,],[$$$4,000,,,,,,,],[$Project B$,-$$$18,000,$$$5,800,$$$6,000,$$$6,000,$$$6,800,,],[$$$6,800,,,,,,,]]$

What is IRR of project b $?$

What is the crossover rate $?$