please don't calculate using excel.

please do it using formula

1.

biyu deposits $400 in an account paying a nominal interest rate 9.650% compounded quarterly. devi deposits $1,200 in an account paying a nominal interest rate i⁽³⁶⁵⁾. After 15 years they have the same amount in their accounts. What is i⁽³⁶⁵⁾?

2.

ram deposits $100 in an account paying an effective weekly interest rate 0.14135%. biyu deposits $250 in an account paying an effective interest rate j₂₆. After 24 years they have the same amount in their accounts. What is j₂₆?