$1.$Find the future value of $$629$ in five years at $5\%$ interest. Assume PV to be negative. Excel Function

$2.$ Mavericks Bookstore sells books before they are published. Today they offered the book, I love me some Finace for $$14$ but the book will not be published for another two years. Upon purchasing, the price of the book will be $$30\mathrm{.}00.$ What is the discount rate$($annual$)$ Mavericks bookstore

is offering its customers for this book?

Remember to use opposite signs for PV and FV$.$ Excel function