$$ Please provide step by step guide without using excel and use financial calculator

Problems $7-10$ are based on the following information:You$$ve just bought a house and took a $$300,000$ mortgage that you plan to repay in equal monthly payment of $$3,159\mathrm{.}67$ during the next $25$ years starting next month $($i$.$e$.,$ you will make a total of $300$ monthly payments$).$ The monthly interest rate is $1\%$

Problem $7$:How much of your SECOND payment will be interest?

Problem $8$:What will be your balance $5$ years from now $($right after your $60$th payment$)?$

Problem $9$:If $10$ years from now you will make a pre$-$payment $($an extra payment in addition to your regular $120$th payment$)$ of $$20,000$ by how many months $($rounded to the closest integer$)$ will it decrease the length of your mortgage?

Problem $10$:If $10$ years from now you will make a pre$-$payment $($an extra payment in addition to your regular $120$th payment$)$ of $$20,000$ by how much such prepayment will decrease your outstanding balance $17$ years from now $($at the time of your $204$th payment$)?$