I would like help in solving this question related to the subject of cash flow for engineering project management subject

Q1: For the two projects described in detail, find the largest amount needed by the contractor, when and Draw a cost and return chart: - The first project: the monthly returns(value) and annual interest are listed in table (1) the deduction of the guarantees and return them according to the general conditions of the contractors. The contractor is entitled to an each cash payment each month, the time period between maturity and receipt of one month. The work begins on 1/8/2018. The contractor shall be entitled to an Advance payment upon commencement of work of 20% of the value of the work. Shall be refunded in the form of four consecutive equal installments upon receipt of the second installment by the Contractor - The second project: the cost and annual interest are listed in Table (2) Deduction of guarantees By 10% Of each cash payment and returned after six months of completion of the work. The contractor is entitled to an each cash payment every month, the period between the maturity and the receipt of two month. The work begins on 1/10/2018. The contractor is entitled to a bonus of $ 500 per month if the project is completed before the tenth month. (25) Degrees 2 month monthly Returns (E) Interest (%) 1 4000 10% Table (1) 3 4 10000 20000 10% 20% 6000 10% 5 5000 20% 6 5000 20% 7 10000 20% month monthly cost () Interest (%) 1 10000 10% 2 20000 10% Table (2) 3 4 10000 10000 10% 10% 5 20000 10% 6 30000 10% 7 10000 10% 8 20000 10% Q1: For the two projects described in detail, find the largest amount needed by the contractor, when and Draw a cost and return chart: - The first project: the monthly returns(value) and annual interest are listed in table (1) the deduction of the guarantees and return them according to the general conditions of the contractors. The contractor is entitled to an each cash payment each month, the time period between maturity and receipt of one month. The work begins on 1/8/2018. The contractor shall be entitled to an Advance payment upon commencement of work of 20% of the value of the work. Shall be refunded in the form of four consecutive equal installments upon receipt of the second installment by the Contractor - The second project: the cost and annual interest are listed in Table (2) Deduction of guarantees By 10% Of each cash payment and returned after six months of completion of the work. The contractor is entitled to an each cash payment every month, the period between the maturity and the receipt of two month. The work begins on 1/10/2018. The contractor is entitled to a bonus of $ 500 per month if the project is completed before the tenth month. (25) Degrees 2 month monthly Returns (E) Interest (%) 1 4000 10% Table (1) 3 4 10000 20000 10% 20% 6000 10% 5 5000 20% 6 5000 20% 7 10000 20% month monthly cost () Interest (%) 1 10000 10% 2 20000 10% Table (2) 3 4 10000 10000 10% 10% 5 20000 10% 6 30000 10% 7 10000 10% 8 20000 10%