Find the total number of compounding periods and the interest rate per period for the investment.

$\backslash$table$[[\backslash$table$[[$Term of$],[$Investment$]],\backslash$table$[[$Nominal$],[($Annual$)$ Rate $(\%)]],\backslash$table$[[$Interest$],[$Compounded$]],\backslash$table$[[$Compounding$],[$Periods$]],\backslash$table$[[$Rate per$],[$Period $(\%)]]],[7$ years,$2\mathrm{.}5,$semiannually,,$]]$